BuddyPress.org

By default, WordPress MultiSite allows for BuddyPress to be installed on a single site (either the main site/domain or the specified sub-site).

Objective:
-offer websites that have their own social network (potential clients could be Homeowner Associations, Book Clubs, etc.)
-each client/organization could have its own groups (e.g. Board Members, Home Owners, Home Renters, etc.) for which admins can invite/approve/reject membership to.
-some organizations may have only 1 group (if you’re a member, you’re a member; if you’re not, you’re not).
-some groups may be public, some private (must login), some secret (don’t know about them unless you’re invited to them)
*** Each organization must also have its own public-facing site (like any regular organization would). So as to say to the public “this is who we are, what we do, why we do it.” And the social network / groups would be just a sub-part of the site.

Proposed Solutions:
(whichever way is better to do it – performance, ease to maintain, etc.)
Option A) 1 BP per sub-site with some custom code that only shows each sub-site’s applicable groups.
Option
Instead of 1 BP per Network, I want 1 BP per sub-site.
Option C)
Every group gets its own WP (non-MultiSite), its own BuddyPress, and its own domain. (Is there any way to mass-maintain certain settings, as if it was kind of like WP MultiSite?)

***
Why I’m asking for help (correct me if I’m wrong):
-if you want a group site, you go to website.com, you sign up, you start a group.
-then the group you started is just another group, listed among many others on website.com
-but your organization ALSO wants its own stand-alone(-looking) site (as if it were to be organization.com)
-but that’s not possible (correct me if I’m wrong; I hope I am) with BuddyPress. Your organization doesn’t get its own “website homepage” page and there’s not a list of groups that just apply to your organization. ********This is what I want to offer to organizations who want their own social network (i.e. members in groups).

Any suggestions, ideas, or solutions?

Maybe these would help get things started in the right direction:
http://wordpress.org/extend/plugins/wp-multi-network/
http://wordpress.org/extend/plugins/networks-for-wordpress/
http://wpebooks.com/networks/

If it turns out the best solution is to just make a new WP (non-MultiSite) for each organization, then I could just save a template, like this: http://premium.wpmudev.org/project/new-blog-template
-This is an acceptable solution if need be.

If one of the solutions is just a plugin above, then please advise how you think my setup should be done to be proper.

Thank you very much.