I don't mean to cut the party short, but living for years in a poor country is not as awesome as it sounds. What seems awesome instead is to go for poor countries for 6 to 8 months per year, and live with your parents or someone who loves you a lot in the other 4 months every year. I've met a Slovenian programmer who did that, knew 10 languages, worked in London for 4 months per year and seemed to have pretty much nailed the "maxing out on hedons" lifestyle.
After 6 years one could then live fairly well in a relatively poor country on 15k.
Additionally, there are ways to get people to pay for your living costs in very poor countries. If you live in the US and are looking for a fun but not too easy early retirement, spending two years in the Peace Corps is not a bad way to go -- if you do want to spend a few extra thousand on living expenses it will go a lot further than it would in America, and if you just want to let your retirement funds gather a few years of additional interest you can do that. The PC does take married couples and loves people with college degrees and work experience. No kids, though.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.