Wow, I feel so young...and on another note, be wary about used welders, they often dont like to work. And if you have a garage the air compressor just seems like a must. To keep the evil cancer that is rust away, a garage that has good sealing is also a must. Perhaps a concrete floor, wood's fine for walls, good insulation and staple the plastic up all over for better sealing. But its up to you, just that if something has to stay in there for a long time its good if condensation doesnt build up in there otherwise your paint projects could rust quickly as well as fresh welds, etc. Ok, good luck with the rest!