I can't give much input on home or hobby shops but here are some things that may be universal. Have all LED lighting with non ballast type lights preferably 48" which are more available and cheaper than 8 ft. . Have a 4 way 120v AND a 220v outlet at each conduit junction; better to have unused ones that unavailable ones. Do a search on how to run air lines which is briefly, slanting up from compressor and with drains at each drop. Have lifts(s) and/or paint booth in line with a door. Have at least an area with a ceiling high enough to lift bottom of a body higher that the top of the steering column. Three of my buildings are Morton type wood frame with 6" of wall insulation and 12" of ceiling insulation---easy to heat/cool. The finish paint booth building is all steel (fire code) with regular metal building insulation and it's hot in the summer and cold in the winter. Overhead doors are the least efficient, sliding barn doors can be sucked in fairly tight, and hinged at the top doors can be refrigerator tight, but need more space. Swinging doors are okay if the hinge post is anchored really well. Also need more space. A deep "janitors" sink near the welding area is handy for cooling and serious hand washing. A compressor drain through outside wall helps cut down on mess. Our shop holds 15 cars/trucks with room to have the doors open plus a deck on one 100 ft wall and one on a 60 ft wall---still need more room . Just scratched the surface and will think of a half dozen more right after I post but there may be just one that helps.
