Hi ltg,

Just stumbled across your post here...

I think you can do this pretty easily now: use the uc_reccuring module to set up a recurring fee that starts however many days or months after checkout that you like. Use the uc_cim contrib (http://www.ubercart.org/contrib/2537) I put together to store the credit card information with Authorize.net so that you can charge credit cards at a later date and for each recurring payment. It gives you a lot of flexibility.

Let me know if you see something missing here or if you need help...

Best,
Chad