The key here is to understand that you are going to need to use strategy and planning to increase the efficiency of how you use your time in addition to making some sacrifices/concessions.

It may seem reductivist, but it helps to think in very basic and broad terms of what you are trying to accomplish.

1) Maintain your physical health. 2) Maintain your emotional health. 3) Maintain a professional appearance and demeanor. 4) Meet and exceed your professional obligations. 5) Save money.
6) Have a life.

You'll note that these are each interconnected. Physical health increases emotional well being and generally improves the perception of appearance. Emotional well being means more motivation to maintain healthy habits that support physical health, and being emotionally healthy makes it easier to maintain a positive demeanor at work. Emotional and physical health improve cognitive ability which enhances your ability to deliver good results at work. Maintaining a positive demeanor and professional appearance creates a positive impression of you in the minds of your coworkers and superiors, so your work is more likely to be judged in a favorable light and you'll find it easier to collaborate with coworkers. Obviously the better your performance is at work, the more money you can make to save. The better your performance is judged to be, the higher your sense of accomplishment and emotional health...The more money you have, the lower your stress and the better your physical and emotional health will be. And having a life requires that you are healthy and have money.

Each of those objectives is built on basic behaviors.

Eat right to maintain physical health, emotional health, and in turn, impact appearance and demeanor and all the rest.

Get sufficient sleep.

Make sure you're getting enough sleep.

Get enough physical activity that you're not slipping into serious decline.

Maintain your relationships with friends and family.

what's important is that you maintain your health 1) How stressful is this job going to be and what is the nature of the stress involved?

If the job is emotionally stressful, where you're dealing with and adapting to a lot of "personalities" and organizational confusion, you may have a hard time leaving it behind at the end of the day and you might get a little depressed. Even mild depression can sap your energy and motivation to do chores or maintain relationships which can cause more stress and exacerbate the depression...So if the job is emotionally daunting make sure you're staying in touch with your friends and family for support and to maintain a positive outlook. Stay focused on what's good in your life and what you're working towards. But also prepare to take more shortcuts for things like shopping and cooking to allow for more time maintaining your relationships.

If it's a job that requires extreme attention to detail and sustained focus throughout the day, or if there is significant on the job learning involved, you'll be mentally and physically exhausted at the end of the day. You won't be depressed, so you'll likely still have the motivation to stay on top of things, but you'll be passing out on the couch by 8 o'clock. So having your meals prepped, and your laundry done, and your bills paid, etc...Means that you can go on autopilot...Get in a good rythm and everything will just sorry of fall into place. But it means you'll need to do all the prep work on the weekends and not let yourself get behind.

2) What skills or habits do you have in place already?

A) Are you a passable/good cook? Can you create a weekly meal plan for yourself and not get bored by Tuesday?

If you're hopeless in the kitchen, make a point to start learning basic skills...You'll need to know them at some point...I'd recommend ensuring you've got a good nonstick pan, a slow cooker, a decent nonstick 8 quart pot, a decent sized wood/bamboo cutting board, a good chef's knife, a good vegetable peeler, and some Pyrex bowls and plastic containers for food storage. Check out the America's Test Kitchen product reviews on YouTube, Jaime Oliver's videos on basic knife skills and food prep, etc. The truth is, you'll never find prepared meals that are as cheap and healthy as what you can make yourself, but learning to cook takes time. Planning, shopping, and cooking for an entire week requires some logistics that you don't really expect until you've tried it and get frustrated that you don't have all the ingredients, enough cookware, enough storage, or enough time ultimately. So your best bet is to use a mixed approach. Cook several protien courses on the weekend that you can mix and match with other things throughout the week. Baked chicken breast is versatile as you can turn it into a sandwich or a stir fry in a couple minutes...same thing with a rump roast cooked in a slow cooker...Or a ham. Frozen veggies are excellent if you can figure out how to spice them up in the microwave. Spaghetti is dead simple if you don't want to modify the commercial sauces...so is mac and cheese (by the way, you can throw mixed veggies in with a standard mac and cheese along with a meat of your choice for a cheap and simple nutritionally complete meal that only takes about 35 minutes to make and clean up).

n the weekend...It'll save you a good deal of money but will cost you time (there's a lot of logistics in cooking meals for a while week. shopping for deals, looking up recipes, making sure you have a well stocked pantry so you're not having to go back to the store looking for ingredients, cooking in batches because you only have a certain number of pots and pans. Honestly, I recommend making 3 to 4 dishes you can eat throughout the week in combination with things you cook as you go. Make one or two things you can eat for breakfast by simply throwing a portion in the microwave. you're a very experienced cook, my advice is to keep your food simple If you're ok eating the same meal every day it won't take too long to get it done, maybe 3 hours tops. But if you want variety in your meals, expect it to take you 7 or 8 hours. You'll need 2 hours to plan/shop (you'll often build your meal plans around what's on sale so it's a combined activity and requires you to either have a recipe already or look one up for the primary ingredients you'll find on sale). you go), prep work, cooking (ironically this is the least time consuming task), and clean up (this can be a real nightmare if you don't know what you're doing in the kitchen learning how to organize things so you don't spill . I used to make 2 or 3 breakfast dishes (oatmeal, scrambled eggs, waffles...anything that can be quickly heated up in the microwave) that I'd vary through the week. I'd make a couple of protien courses (usually baked chicken breasts/thighs, baked or fried fish, some ground beef as either a meat loaf or hamburgers), and occasionally a slow cooker soup or roast if there was a sale on something. Then I'd make several vegetable courses that I could mix and match to get different meals throughout the week.

If you're a bad cook or a finicky eater, don't waste your time trying to do elaborate mall planning. Just If it's a job that high stress expect to be wiped out after 12+ hours. around things like time with friends (especially if you like to go out and have a few drinks)...Some people have amazing constitutions and can go drink and get two hours of sleep and be sharp and on point the next day, but if you aren't one of them, limit your partying to Friday and Saturday nights.

If you're good at things like meal planning and cooking you may be able to shop for and prep your meals over the weekend. If you're not good at this, you should probably take some time to learn basic cooking techniques anyway just because they'll increase your overall health and save you tons of money over time.

If this job is going to be stressful and/or you don't have solid routines or skills in place that allow you to perform tasks like shopping, cooking, cleaning, laundry, bill paying, etc efficiently, you may quickly get buried. ...I say this because the job will likely leave you wiped out and you'll just want to come home and sleep...And if there's extra work after hours (like you have to do research, process correspondence, study/learn, etc) that 60 hours can easily hit 70 or 80...Even if it isn't required, if there is any element of on the job learning, which there usually is, you're thoughts will be focused on the work and you'll be hard pressed to learn all the domestic skills you need to be effective or efficient at maintaining things at home.

But if you're the kind of person who finds it difficult to get motivated to do those kind of chores, or if you just haven't developed good habits that make tasks like shopping, cooking, & cleaning efficient, you're likely to find it difficult to do anything but the bare minimum while working those kind of hours in a new and likely stressful environment.

If the money is sufficient I'd recommend looking at buying prepared food (look for stuff that's healthy and balanced)...Buying food to cook and letting it rot in your fridge can happen very easily and quickly offsets the additional cost of buying meals at places like whole foods. You need to maintain discipline when doing this to not let yourself start overeating or eating garbage. Because after a 12 hour day in a high stress environment, you're going to crave fat and sugar and more calories than you need.

You'll likely be fed at work occasionally, so take advantage when the opportunity presents itself...See the notes above about what you eat and the portions you consume.

Make sure to stay on top of your laundry (it's pretty easy if you're in a place that has a washer and dryer, but if you have to go to a laundromat make sure you're allocating two hours a week to get that done).

Try to minimize your mess.