Better way for multiple sites / sub sites - Joomla! Forum - community, help and support

i've seen discussions on multiple sites , can't find answer requirement.

1) main site - select "team" part of

2) team site - each team has site - info team, can see common resources main/league site, filtered team site.

my thought use sef on sites, install each team in subdomain - i.e. tigers.localsportteam.com, etc.

have main joom site - pick team main page

have shared resource sites, i.e buy uniforms, equipment, etc (supplies, venues, etc) - each own joom install.

the trick is, when on team site, , menu items link site, how can pass site name , filter content?

is there easier way?  hoping 1 of multisite packages help, seem able have users logins cross systems , clone content. want have content in respective places, filtered relevance - allow them in larger area - instance, in supplies, need uniforms, local shop doesnt have it, widen "results" - or list of shops.

i thought have done commerce, pick neighborhood, list shops, news, etc - work.

please don't blast me if there topic somewhere, point me it.  need make happen - little admin possible - kids leagues don't pay - , of course can't maintain own stuff....

thanks in advance ideas.  pm me if want or post.  need soon.

have gotten anywhere endeavor?