I built mine as cheap as I could build but still built well-its 30x30x10, frame construction, metal outside & roof,standard 3 1/2" wall itch, vinyl back on roof. OSB inside walls, two 12wideX8tall insulated garage doors, one 36" entry door(steel), 3 3'x3' double pane windows, trusses are every 2'(storage & lifting-I regularly pull/pick up anything from the roof-recently was a boat engine). Used 100k home furnace, 36" exhaust fan in the gable on opposite end from garage doors(open doors a foot or so on hot days, creates lots of breeze+keeps out sun)plumbed for toilet/bigass wash sink. Wall mount on-demand water heater. Air compressor is outside under 14' lean-to down one side, only one outlet inside so far-I got hose. I installed tees so I can install more air outlets, but have yet to do it. I could live there-folks wonder why they never see me on weekends.
