You need a lot of storage or only deal in precious metal breakdown to do that.. I did gold ingots off polypropylene PCB tubs a while in a small room by ordering pallets of boards from whole sellers.. This was before soccer dads seen it on YouTube and drove the pallet price up, though..
cats you can do it too if you have a yard that takes them.. $50.00+ a piece and you can fit about $400.00+ in a compact car trunk..
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