I feel like it'd be easier to rally your student body to get rid of the stupid payment systems altogether and do what some other schools do: $free.99 laundry, paid for by a per-semester lump-sum "laundry fee". The washers and dryers are standard fare - still commercial units, just set to $0.

It's so much nicer to be able to card into the laundry room, throw your clothes in, hit start, and leave without having to fumble with Enshittification.