Looking for highly customizable membership plugin

I am looking for a WordPress Membership plugin that can be customized to do a few things. What I need to do is rather complex and I’m not entirely sure if it’s possible, but I figure this is the best place for advice.

On my site, there are basically two types of people who register: Authors & Subscribers. Authors will be creating content in which Subscribers can pay (monthly) for. Each Subscriber purchases a subscription to a specific Author of their choosing, and is restricted from seeing content from other Authors (unless they add that additional subscription).

The challenge is that I’d like to tie this together as automatically as possible. I’d like for, when an Author registers, they following happens:

? A Subscription Level is created specific to them
? During registration, they can choose their subscription fee, which is then tied back to that Subscription Level
? Their WordPress Author page is restricted, except to a Subscriber who subscribers to their Level.

I realize this is likely not supported with the standard features of any plugin, but if anyone has seen customizations for one or all of these types of features, I would GREATLY appreciate some direction.

Thank you in advance.