Use posts inside to make several roost bars at different heights. You want the roosts away from the sides so no fence climbers can reach in a grab a sleeping bird. Also, I haven't seen any discussion of rain and wind protection... I am in FL, too, and we do get some bitter winds...I had to work in them, so I know it can get dang cold, and the chickens feathers cannot keep them warm if it is windy, especially if they get wet. Heavy duty tarp (silver on one side, brown on the other) will provide shade, rain and wind protection.