My advice to you is to set your business up on a US-based hosted server. Unless you are laundering money for the mob or living on an inheritance, you will go broke trying to run anything online physically hosted in Belize, or to do anything that requires you to be online in Belize for hours a day. What you need to prepared to do is log on a few times a day for a few minutes each time and do your thing.
There are only three internet access speeds in Belize: Slow, Very Slow, and File Not Found.
There are only three kinds of rates: Expensive, Very Expensive, and If You Have to Ask You Can't Afford It.
Why? 'Cause its a MONOPOLY...you know: that which combines the worst features of capitalism and communism and the benefits of neither. Theoretically, that's supposed to change in a couple of years but I have a sinking feeling that it won't.
Your only other option is maybe to see what the rates are like in Chetumal these days and maybe set up an office there. Lots of nice housing available in the Corozal district you can commute to.