Yes, osha and the fire department have shown up. And it is a big deal/pain in the ass.

If your guy is cool and reasonable it can work out fine. But if he is having a bad day, so will you.

That business exists, but they do it by the barrel,pallet, truckload. It is for the coins from wishing fountains. The coins need to be cleaned and sorted before they can be turned into cash. It’s a real thing.