Dan...do a search on the job topic on this website...you'll find many posts on this topic...
It is possible..just depends on how creative you are...
Starting a business is the best way to do it from what I've seen...which employs the local work force..which helps Belize...
An old saying I've heard people say is "If ya want to make a million in Belize....bring 2."
Hope you go and feel the magic there...visit...talk to lots of folks.
If you go there with an honest desire to help improve the local economy I'm sure many would welcome it.