Roastin in so Texas

My "home" back when I was in the Missouri sticks was a what Tx. calls a barnamendium, red neck for countrytype condo mendium.... sorta, I called it a "pole barn house". I only used 1000sq ft. of it. I had a window ac. unit and never turned it on till noon if it was HOT. Cooled it great and there it costs squat. Costs may be higher In Ca. and etc.!!!
But I insulated it well! Walls, ceiling, subfloor. Such would cool great a 30 x 40 garage if insulated.