Here's what I did for a semipermanent spray booth
I did this about 2-3 yrs ago when I started painting my own bikes. I need a booth to do the job right, but I couldn't really justify a permanent booth since my painting would be periodical at best...so I came up with a 'convertible' paint booth .
Started by cleaning out a corner of my garage and putting a 8' x 12' 'ceiling' up....
Then I built an 8' x 8' wall and a 4 x 8' wall and hinged those two together so I had a section that was 8 x 12 with a 4' "door" on on end.
Then I took that and mounted it up to the outside edge of the 'ceiling''
here it is with the 'door' opened.
Next I made a wall section that was 8 x 8, (actually it was just a tad narrower than 8') and hinged that at the top of the 'open end' of the booth. Then I put some deadbolt type latches toward the bottom of the wall and a small metal plate on each 'wall' to aligin with the dead bolts. that made it so I can swing the 'end wall' up into the booth and latch it out of the way..
I then cut a hole in the outside wall and mounted an old squirrel cage blower to the outside, and put an opening the size of a furnace filter in the hinged wall..
Works great! now I have my paint booth when I need it...
and my storage space during the winter/summer months as well