Sonance makes a 8x8 video matrix that does component via cat5. 9800 for all 8 locationss.
ive almost abandoned the dual cat5/rg6 structure approach. wire what you need and have plenty of 1" carlon pipe from each location to the crawl. 2" at the network box and a few from crawl to attic. same basic cost but allows for many different future configs.
Diplomacy is the art of saying hire a pro without actually saying hire a pro