I've been in Belize for almost two years. The heat can be unbearable at times, but it's only temporary. I am living in Cayo. My reason for being in Belize is because I always wanted to live outside of the USA for at least a year. After visiting several countries, Belize was the least expensive and most friendly. I cannot pinpoint exactly what made this the place to lay down my luggage, all I know is that it felt right. So, here I am. I opened up my own business called Andrea's Wash, Dry and Fold Laundry Service w/free next day pick up and delivery in the San Ignacio/ Santa Elena areas.
If Belize was never in your plans to visit, why not reconsider. While there are challenges (as with everywhere) it's laid back and you can take your time and breathe.