Buddy of mine runs a cash only bar and grill.

The costs to handle cash are fairly low. He bought one of those fancy cash counters like they have at the bank for a few hundred. He also bought one of those cheap little ATMs for perhaps $500 and charges $1 to take out cash. He keeps $2,000 on hand at all times between the safe and the ATM itself. Otherwise, he just stops by the bank two blocks down the street to deposit profits. As for security, well, they just carry concealed weapons.

The ATM paid for itself in the first month, presumably also the cash counter machine. Notably they did have one counterfeit $100 come through that they forgot to scan. I suppose that’s novel to cash although chargebacks on cards also do occur.