Yep, just some plastic sheeting and duct tape. It's been up for 3 weeks now, lol.You fashion that booth at home?
Did something similar before with box fans at one end and furnace filters at the other. And duct tape. It worked.
There is a vent slit up the back, and air flowing through from back (the rest of the garage) to front ( garage door) via the swamp cooler and two box fans.