How do I make CoursePress Pro function like a Subscription platform?

How do I make CoursePress Pro function like a subscription platform?

Here is what I want vitashift.com has courses for sale, I want the students to be able to pay for courses individually as well as have an option to do a monthly, quarterly, or annual subscription that would give them access to different courses depending on their subscription level...

Basically kinda like WPMU I can buy plugins or subscribe...

Please advise,
Rus