Hello,
I've designed quite a few websites via "site builder" sites like Shopify, Wix, Squarespace, etc., and I would be happy to help you with your project. For your recurring payments PayPal does offers a service that does just that. I'm sure others do as well, and I could look into it for you if you like. If you would like to discuss your project further feel free to message me. I also work in graphic design if that is a necessary part of your project.
Thank You,
-Eric
Elements Studios, LLC
South Carolina