I have friends who live in lush, tropical regions (Micronesia and Papua New Guinea). If you want to live "native," it can be done cheaply. If you want Western conveniences (indoor plumbing, AC, electricity, refrigeration, ice cream, etc.), it's very expensive. Every time they need medical care beyond first aid level, they have to fly to other countries (very expensive and time consuming). Our friends in PNG fly to Australia, and our friends in FSM fly to Hawaii. Also, one friend in PNG has chronic malaria even though he took preventative inoculations. Also, our friends in PNG are constantly under threat by gangs of thieves that lurk along the roadsides (they have been attacked). We have friends in another region of PNG who get caught in the crossfire of rival tribes. It's beautiful country but not an easy life.
There is no perfect place in the world. There are pros and cons, and trade offs. It depends on each person's priorities.