Take your monthly revenue expectations and add a few rows below on your model for fixed card machine rental costs / estimated % debit charge costs / estimated % credit card costs. Work our cost per provider. Ask them for fully stacked quote breaking out every card type and any hidden expenses in addition to terminal rental. The hidden fees with many of the old players are crazy, especially on things like PCI, Amex and corporate cards.
If you don’t fancy any of the above next gen payment co’s and want old style try:
PaymentSense. They focus on indie retailers.
Again, see if you can wangle short term contract and low fees.
Other co’s to try inc:
First Data
Barclaycard
Global Payments
Worldpay
Adyen
Pretty much covers majority of industry. Be wary that traditional co’s business model is to lock you into a long terminal rental of upto 4yrs, hide random costs and split out fees per card type, ramping up Amex and corporate.
For your expected revenue I wouldn’t bother. Take one of the next gen co’s with no lock-in and if you hit your revenue targets after getting off the ground you can swap out with little risk within a few days. Pretty annoying being locked in a multi year contract if things don’t go to plan.