Hello PGDesigns1,
Welcome to Community! It's great to hear that your customer list is expanding. With QuickBooks Payments, you can securely email an invoice to your customer with a Pay now option, so you get paid on time. However, this feature is currently only available for Canadian payment methods as listed here. Please feel free to submit a suggestion, if you would like to see additional options come available in future updates. In the interim, you can make arrangements for your customer to pay by cheque or e-transfer, or review other options with third party apps.
If you have any other questions, feel free to reach back out. We would be glad to help!