Safe-guarding coin operated laundry

[Nataly S.]

I’m a first time investor purchasing a 56-unit apartment complex. Each of the 14 buildings has its own coin-operated washer and dryer in the common hallway. I live out of state. How do I insure that our PM is honest when collecting the coins? Does anyone know if a coin counter of some sort exists to insure the safety of my money? I am open to other ideas for laundry (in-unit, leased, etc). Thanks in advance for all your help!