I'm 25 M and currently make $50K/yr for an airline and I live in Michigan. My GF of 2.5 years is going to school in Kentucky in June. Over this last weekend the idea that I move in with her and use my ability to jumpseat to see her on a weekly basis (I work 4 days on 4 off, call this plan B) came to fruition and is a legitimate possibility. The previous plan was that I do the same but maintain my apartment (this was plan A). The new version of the plan is that I live 3.5 days a week with my sister and cancel my apt. I currently pay $850 per month for a one bedroom apt, she will pay $1300 for a much nicer apt. Prior to plan B she was simply happy with me coming to visit her as much as possible and didn't expect any form of payment. She spoke with her parents and they think that I should pay 50% of the rent for her place. Which would be $650 which added to the cost of parking my car, using Uber in the other city, and a much longer commute from my sister ($185), totals $835. If that happens Plan B is $15 cheaper for me and from my perspective not worth it at all (option 1). We talked and she suggested rent at $500 which would make more sense of course. That equates to $685 as opposed to $850, $165 cheaper for myself. That becomes palatable considering I would be living out of a suitcase half of the time without my own apartment (option 2). Option 3 is my favorite and seems most fair in my head, which is where you all come in. I proposed this to her, which is that the money saved from the whole thing is split 50/50. That should be about $665 between us. Rent at $350 then... $350/month for a $1,300 apartment. It seems crazy to her from her reaction, when we talked about $500 that seemed like a discount in her mind. I point out to you all, Half of the total rent, for the half the time (time I'm actually there), is $325, half of the savings I will have is $332. Not only would I be paying for the time that I'm there but splitting the savings this move would have. We are to talk about this again in a few days, but in person. I have to add that it all seems trivial being that I plan to propose in 12-18 months which her and her parents all know.