Thank you all for your responses.
I guess it all depends on if the flight will be on time, and how long it takes to clear customs and immigration; I guess if we are 15 minutes late and in by 4:00 PM, another 30 minutes to clear customs, a taxi ride that takes another 30 minutes, that puts us in the Municipal airport at 5:00 PM for a 5:30 flight...I'm assuming here that the municiapl airport will be a lot smaller and laid back than any airport in the US/Canada these days, so no long wait at security lines or anything like that. Does this make sense?
2 more questions:
If all of this fails, and I end up having to spend the night in Belize City, will the airline send me on the first flight the following morning?
How does this 10% dicount thing work?