I made my spray booth out of an old projection tv.
Gutted it , put in a peg board floor and a light just inside the top lip. I have a vacuum motor from a bank siphon system plumbed into the bottom that blows outside . Works pretty good . I cover the peg board with paper towels at the front so just 5 or 6 rows of holes are open at the back and the paint fumes are sucked down and out.