How to charge for laundry

[Edward Roe]

My wife and I recently purchased our first Multifamily. This property came with large laundry appliances in the basement for each unit. None of which have any sort of payment system attached. I don’t necessarily want to install coin op because I don’t want the hassle of having to go to the property to exchange the quarters etc. Does anybody here have any experience with automatic systems like Shinepay or anything similar that can be paid without the use of coins? 

Thank you!