As a side gig custom enclosures would make money. Do you have a shop or large garage? Build a couple standard sizes (T8 or the like) an sell them.
So minimal tools would be tape, routers, tables, table saws, hand saw, fill an bits. Then you need the material, good luck with that part!
If you can do this you could make money if your price is lower then AP or your in stock. Think small shows with ten cages on the floor.
https://ball-pythons.net/forums/show...ly-built-cages
Good luck!