Vietnam and Thailand you don't need to worry about costs at all. Everything is so cheap here. I'm in Vietnam right now and my dinner tonight cost less than $1 USD (big bowl of Bun Bo), and I bought a carton of beer for less than $10 USD and a pack of cigarettes for less than 50 cents. I also got a new 20L keg of water for $1 this morning that will last me a good 2-3 weeks.

I'm renting a 1 bedroom apartment for $400 USD per month including unlimited, super fast wifi, and it comes fully furnished. I could easily get by with a studio if I wanted to save a bit more but I mean, $400 per month for a 1 bedroom apartment is nothing so why not?

If I want something delivered the delivery fee is like 75 cents. I have a scooter so spend almost nothing on petrol to get around, but the times I've caught a Grab it's been like 75 cents to $2 depending on the distance.