I've been reading these posts with interest as I am getting close to completion on a new shop and garage building as part of a move into town and major downsizing. Due to zoning limitations I was able to build a 24 by 40 foot building with a 12 by 40 attic room. There is a one car garage, a wood working shop area, and a metal shop area, all of approximately equal size. Since I'm in Western Wisconsin USA we get cold winters (minus 40 is possible but rare), so the building is fully insulated with spray foam in the walls and roof and 2" foam under and around the floor slab. I have a 12x24 Atlas/Craftsman lathe, an Atlas horizontal mill, a Grizzly mill-drill, a South Bend 9" lathe, drill press and a Rockwell wood/metal band saw for the metal shop, and will be moving them in once we get the walls of the shop areas painted.