The key to remodeling is having a good working team. In San Ignacio Town there are many builders including Americans, Canadians and local Belizeans. Always ask your real estate agent or other expats who they use. It is highly likely that they will recommend someone that they have been using for years and that was initially recommended to them by someone else.
There are many hardware stores within the Cayo District but nothing like Home Depot like you're used to. Of course, you can find most stuff in Belize but remember, they are all imported. Anything that you cannot find in the Cayo District or Belize City, you can order online and have it shipped to Belize.
(A young, Belizean AC technician pictured on the roof top of Gordon House in Belize City.)