I had a metal garage built last year. The slab is 24' x 40', the shop is 24' x 28' with a
12' wide carport on the south end. I had the ceiling of the carport finished so that I can use the space above the carport as a loft/storage area. The roof has a 6/12 pitch and the roof and walls are alll insulated. There is one walk thru door and a 16' wide overhead door. The slab and building ran $20k. It cost me about $1k in materials to finish the inside of the building and put plywood down on the loft floor. The walls are
10' tall and the roof is 16' at the top. This year I added a 3 ton Trane a/c unit with the compressor mounted outside under the carport and the air handler mounted in the loft on one side where it would be out of the way. The a/c unit ran about $4k. The electrical for the building was about $1.7k. Here are some pictures.