Sandbox

Hello.
Looking for an extension or any way to manage nodes of a network.
in other words,

• i am designing the portal web of a non-profit network of a whole country
• this network consists in many nodes (groups of people geografically near)
• each node has at least 3 persons (users)

So the idea is that node info is listed in a node_list (kind of user_list) so everybody can see node name, address, contact info, activities, etc, and also each node representative can register his/her node in the database so that info can be accessed by this list...
So this is apart from the users registration, because many users can be on a node
and a node may have some people wich dont use the internet, much less be registered as users in the portal!

is this too complicated?? please i need help
should CB or joomlahive or something like that work for me??
thanks in advance