I'm assuming they aren't close enough to just run some cat6 between both houses and have a single instance govern them?
I'll be honest though, although your plan sounds cool as fuck, it also sounds like a really terrifying project from a security perspective.
No.
There's no need for monoculture - especially on a platform that aims to be decentralised.
Look at it this way - if some town has three gay bars, three metal pubs and three old-man real-ale pubs, it's not an issue for the LGBT community, the metal community or the drunk old men; they're just different places to drink. Possibly the drunk gay old metal fans might get confused, but they sound awesome and are likely welcome everywhere.
...actually, thinking about it, I bet the drunk old men probably do have an issue with all eight of the other pubs they don't go to. But that's just them.