I converted my garage in SW Florida to a workshop. Best investment ever was a split A/C unit.
I have a rule to never open the garage door, unless I truly have no choice, when it rains. The cast iron tries to rust immediately after that.
Spray your cast iron tops with CRC 3-36 (available on Amazon, one of the woodworking magazines rated it the highest for preventing rust a few years ago, and, IMHO, I feel it works far better than Boeshield).
You'll love the working conditions. Don't forget to clean the cheap filter on the A/C often. I added blown insulation in the ceiling, which did noticeably help.
Where in SW FL are you located?
- After I ask a stranger if I can pet their dog and they say yes, I like to respond, "I'll keep that in mind" and walk off
- It's above my pay grade. Mongo only pawn in game of life.