"Debit card" upgrade for businesses

I think it would be pretty sweet if business owners had a option to buy a permit for around 100-200k which enabled customers to choose between transfer and cash when paying like how the NPC ran car dealership works.

The transfer option could add a extra fee of maybe 10% like what Mastercard, Visa etc do IRL to balance it a bit. 

I like that, choosing to have a 'card machine' or not is always an interesting business choice IRL and no reason it couldn't be in the city

Moving to accepted for discussion on best way forward.

Adding dev ref: #458

Reassigned

Dev ref: #529