Sub sub blogs

Is there any way to do sub sub blogs?

We want to setup a site to have paid sub blogs who can create x amount of their own sub blogs (no public registration on sub blogs). This is for youth sports clubs to pay for access and then be able to create individual team blogs within their site.

I doubt this is possible. So, anyone have other suggestions on how best to setup something like this? Maybe role manager plugin setup using just pages on sub blogs? Need something extremely easy for non-techies to setup on their own.