Paid Membership of Individual Pages / Projects / Sections

I’m looking for a plugin (or plugins) to create a website that’s a cross between a “Membership” (buy access to whole site for a chosen period) and “Teaching” (pay for individual courses and track your progress in each) site.

The idea is that users can buy access to different pages (projects) online, whenever they want and for their chosen period, and the site does the payments & each project’s subscription period.

So, for example, a user could join the site then sign up for “Project A” for a year, be amazed and choose to sign up for “Project B” for 3 months. Then later sign up for “Project C” for 6 months, etc.

Does anybody have any suggestions of plugins that do that sort of thing?