Most homes for sale to require a pass of termite inspection or a current termite treatment. Please contact your Local Cooperative Extension Office to pin down what the requirements are in your area.
Carpenter ants in FL would be the same as carpenter ants in other regions of the country. We generally recommend using Termidor SC outdoors around the perimeter of your home. This is labeled to be used every six months outdoors.
What types of bait are you using? We would be happy to make another recommendation if you have been using them for a while.