"We really do want to move to Belize but we aren't sure what we can do there to generate money."
If you need to generate money as a condition to moving to Belize, forget it.
If you have enough saved to live in Belize for a year, and that amount will vary considerably depending on where in Belize, and still have enough left to relocate back if you decide to, then take a year vacation in Belize and go from there.