Southern Texas Coop
This is the best Texas coop design I've seen. I liked it so much I made a mini version for my urban bantams in Los Angeles. Why bother with AC, which can get clogged with all the dust chickens produce, when you can just design a coop for the environment in the first place. Open air coops generally take less materials too.
I assume you are planning to attach a run to the side of your coop with the pop door. If so, perhaps plan for it to be roofed (for shade and protection from those wicked Texas downpours). Then open up most or all of the wall of the coop facing the run and replace with hardware cloth. That wall will be protected from the weather by the run's roof but will allow much more air circulation.
As I just posted on another thread, those of us in warm climates have different challenges from our northern friends. Coops shouldn't look the same all over the country.