Sorry to disappoint you, but no you cannot live "comfortably" in "poor countries" for $100,000 for "years". Well, unless you mean like two years.
I lived across South East Asia for more than decade and now live here full time. I have to live on around $20,000 / year most of the time since starting my company. And I do not live anywhere close to what average US / EU citizen will call "comfortable" let alone people from valley.
Stories of rich living for cheap in poor countries its just that: stories. It only possible if you preserve your US salary. For $50,000 post tax a year you can live well unless you have kids that need not a "poor country education".
Sure, if you're starting from nothing and expect to live a Western lifestyle. But you can draw down $5000/year from that sum for a very long time, and make twice the average Indian yearly income.
50,000 sounds like a lot. Most people in West European countries don’t make that much.
I agree (from semi-relevant experience). Also, any “poor” country that’s inexpensive enough to fit this requirements probably isn’t one you’d voluntarily live in.
Side note for the original commenter: It would be kinder and more accurate to state “lower cost of living countries” than “poor countries”. There are numerous lower COL countries that offer a higher quality of life a than that of the US but they aren’t “poor” (I moved to one).
The person was probably from a poor country already and was used to that.
I live in what according to Wikipedia is 18th most expensive country in the world. Average person working full time as a nurse here earns about 30k dollars a year after taxes. If they can survive here, 20k a year in most of South East Asia should be perfectly fine for comfortable life.