What a question!! Should you retire in Belize?? Amazing.. If you don't know, who would know?? A band of strangers to you?? I just find it amazing that anyone would ask something like this, everyone need to do what feels good in their gut in order to feel good about their choices, not what everyone else think is good..
Now if you asked how it is to live in Belize it would put things in a different light.. that is easy.. do you have all the time and patience in the world, respect for others, an open mind, without all the 'must have' ideas, economy to pull it off, a good part of commonsence toghether with an understanding and empathy for the ones that doesn't and believe you have what it takes to live on a small island it is wonderful, if not, it is terrible..
My grannie used to say; listen to the advices of others, reflect over them, throw away the ones you don't like and make a decision from what your hart tells you to do... the times I have followed her advice things has worked out to the better...
Good luck!