Hi M&V!
Sounds great about the new business. I am not entirely sure this will work for you, but you could just send them a paypal request. That way they can use a credit card.
And, you can set up a simple website and have a paypal button on there if your prices are not unique to each order.
Google has a shopping cart too.
I like using paypal because you then have an email address that you can continue to market yourself with. Existing customers are a whole lot better than always looking for new ones. Especially if you have paid advertising involved to get them!
Feel free to drop an email if you need some help with online marketing, that is what do for local businesses.
Best of luck to you!