Something i will be considering (once the round is big enough), is incorporating an online method (via my website) which i used successfully with a previous business venture.
It worked via paypal, the online payment system.
Basically the customer goes to your website and pays from there, by whatever means they see fit, ie, credit card, current account card, etc etc.
The amount then appears in your paypal account, together with payers details. Its easy to reconcile from there. The money can then be transferred to your own accounts whenever you see fit.
Its not the easient of things to set up at first, but once in place it is fantastic, and the % charged by Paypal is cheaper than what the credit card clearance companies charge, with no setup fee either.
The details of how a customer pays in this way can be written down and printed on a slip and handed to them, with a reminder slip following each visit.
Not all customers are 'internet' savvy, but most are these days and are happy to make payments via it (the internet outsold the high street last year)!
Worth considering.
