Most lawyers I have come across anywhere, and Belize is no exception, are adept at court procedure and drafting forms and little else. Especially in Belize, don't think in terms of suing a lawyer for substantive redress if anything goes wrong. You may pay a lot in legal fees but you won't get substantive redress.
I know a local lawyer (Belize City) who does specialise in contract work here, and he was highly recommended to me by someone whose own business experience suggests he knew what he was talking about. But he would need a very clear brief. He is unusual in that he is also a qualified accountant, so he has a much broader perspective than many lawyers. He originates from the USA, but he is qualified to practice here as well. With the above significant caveat I could PM you his details.