In this climate I really feel a 3 sided or open air design is better; I always cringe when I see a box type coop in the South. It never gets what a chicken would consider cold down here, not even last night at 21 or so. But they can die in the heat (you want heat tolerant breeds; you don't want large fowl Cochins, for example, or so I just read this AM.) Here's a thread with some Florida type ideas and pics:
https://www.backyardchickens.com/forum/viewtopic.php?id=163417
https://www.backyardchickens.com/forum/viewtopic.php?id=163417