Others may differ, but I have never envisioned Florida as having particular appeal to bicyclists. Florida's primary appeal seems to be (1) the ocean/gulf, (2) theme parks around Orlando, (3) South Beach. These do not lend themselves particulary well to cycling trips. Florida is an end-point for various trips (including Adventure Cycling's Southern Tier trip), but IMHO, doesn't seem to have much to offer in the form of loop-trips.
The positives (1) Florida is flat, (2) airfares to FL are generally very low.
Flat terrain brings up an interesting point. On the one hand, cyclists don't like hills. On the other hand, without at least some hills, it gets awfully boring. I think that FL's terrain falls in the boring category.
Summer is a killer in FL - I would think that the natural season would be November to April.
Why "air-conditioned tents" ? If you are going to the trouble of installing air in a tent, why not motels/hotels instead? If this is primitive camping with air-conditioning are you going to run generators through the night?
Can you come up with a theme/particular attraction for your tours? Gulf-to-Atlantic, Key West, Everglades, etc?