Show me your air line setup

First suggestion - build a shed OUTSIDE of your shop but butted up against it (or at least withing a foot). Insulate the hell out of the shed on the wall facing the shop and put some rigid foam insulation in the shop where the shed is. Put your compressor in the shed and run air lines into your shop. There is nothing like having the compressor go off unexpectedly while you are in the middle of doing something delicate...