Can several users share single subscription?

I'm working on a project where single subscription needs to be shared between multiple users, in other words, I need to provide ability for group of users to purchase single subscription and only one of users will be paying for it.

So what I need is:
* subscription for single user
* subscription for 20 users with one fee (only group admin will pay the fee)
* subscription for 30 users with one fee
* etc..

I know that this is not how your plugin works, but maybe you could provide me with some tips how I could achieve this functionality?