[LEAKYSEALS951]

Get a bunch of cheap harbor freight type tarps. They come in large sizes to minimize the joints that would need to be sealed. You could even zip tie them to a rudimentary wood frame if you were painting outdoors. The structure would have to be strong enough to withstand wind/rain, but you get the idea.

https://www.uline.com/Product/Detail/S-3886/Tarps/Woven-Poly-Tarp-Blue-16-x-20?pricode=WB1548&gadtype=pla&id=S-3886&gclid=Cj0KCQjwoub3BRC6ARIsABGhnyYKlVYGUYDkbxgqKMIx TyNJv_Kuka7noiCMmVpIL6b3KiGm7zKH9FUaAkYMEALw_wcB&gclsrc=aw.ds

holy crap- these prices aren't bad for the size tarp they are.

https://www.uline.com/Product/Detail/S-5128/Tarps/Woven-Poly-Tarp-Blue-20-x-30?pricode=WB1548&gadtype=pla&id=S-5128&gclid=Cj0KCQjwoub3BRC6ARIsABGhnyYDW2FalnUYXDk56F96 mvOE5dzdmhck1_56I63hRkwPqdukPCWX8yQaAvjXEALw_wcB&gclsrc=aw.ds