[GreyingJay]

I'm not clear on the value of an air compressor in your pit. What will you use it for? It will have to be small with low CFMs (so no air sanding), you won't really use brad nailing or stapling (?), you can't be airbrushing or spraying or grinding, there's not a whole lot of anything to inflate, and anything you can do with an air wrench at this scale can also be done with cordless power tools or hand tools (like a hand riveter).