Based on my 10 year experience in Central Florida — some thoughts:
Totally agree — and then build your barn as open as possible (with sliding doors to close if/when you get bad storms). Catching any prevailing breeze makes a HUGE difference
Ensure ample hay storage.
And store it in an air-conditioned feed room
Excellent advice!
And as I think I’ve said in an earlier post — if you can swing it a covered arena is a godsend. Shade makes a huge difference in the summer – and a cover allows you to ride during all but a driving storm and keeps your footing from flooding in daily afternoon rainstorms (as others have noted we can get ~ 2" of rain in a single afternoon storm)