My set up was rather cheap to build. I use electro-static powder.y booths are built out of duct work. Right at 3'x3' box. One side cut out and a hole in the bottom and top. My vent system runs out the top and the bottom hole is covered until I need to reclaim paint. I hang jigs on a 1/4 x 1/4 square tube that has 1/8" holes drilled at 1 inch spacing. Hook points go into hole and then covered with aluminum angle that has foam tape on the inside. Foam tape covers the hook bend and shank during paint. Ground is connected to the three aluminum angles attached to inside of box. Load jigs onto bars, lay in angle, cover with foam angle and spray away. I have three racks per booth and 4 booths. Black, brown, GP and white. Sounds like a lot but you can find the stuff pretty cheap. I also just run the $100 Eastwood guns. Worked well for me doing 100,000 jigs plus a year.