Starting salvage rebuild business.

I am starting a salvage rebuild business officially. Personally, We have rebuilt 5 Mazda Mx-5s from salvage CoPart/IAA cars. They have been inspected, licensed and have been driven many street and track miles since built. We have done replacements of both subframes, all suspension and driveline components, engines, transmissions, electronics, and body work. We have an 15x30 inflatable paint booth for now. And some harbor freight guns. I just applied for my state salvage/rebuild license and waiting for insurance for dealers license. Already got my MHP inspections and ready to go.

Any pointers on better paint guns, etc would be appreciated.