The business generates 120,000 pounds a year in sales.
You will be buying our customer base, location and machines for 15000 pounds.
You selling a total deal for 15k GBP, and that same deal brings you 120k GBP a year? Well, that doesn't make sense on the business side, but if everything you say is true, then this is more of a gift than a sale

We currently charge 17.5 percent per transaction.
People complain about 5% of the fee, and 10% is already considered a real robbery - and you charge as much as 17.5% per transaction? Your customers obviously have no other choice or they think this is a normal fee, but it is in any case too much even for crypto ATM.