Living in Florida myself, mine certainly has AC. Pretty much #1 priority on the list as we searched for a PUP. When we first started looking for a camper we weren't really sure which direction to go in. All the types have their good points and drawbacks. We settled on a PUP because of low towage costs, ease of storage (a driveway and good cover), and last but not least cost for the unit itself. Without a lot of effort you can find a good used Pop-Up with varying amenities from about $2,500 to $6,000. Mine cost me $3,200 and it has AC, a shower, inside/outside stove, awning, holding tank, water heater, and sleeps 6 quite easily.
It all depends on how much time you actually spend inside I guess. We figured most of the time we'll be off doing something, or sitting outside anyway. Kind of why we go camping in the first place.
I sure did see some nice Class A's, C's, and TT's in our search though....maybe in a couple years. May really be able to get a good deal on one then, though who knows.....with gas prices...may only be able afford to 'camp' in the driveway then anyway.