Social sites like that need a huge critical mass of users to function; you're better off coming up with a different idea.
Yes you can however you required a plan for it. The plan with very single details and future forecast...
I think I’m a combination of Lisa (non-domestic, married late) and Amy (ignores hyper-controlling crap). In any event, I moved 600 miles away and I don’t bother going back since my grandmother died. My holidays are spent with immediate family and chosen-family, and are occasions of pleasure rather than stress. I like being able to look forward to Thanksgiving dinner!
it's a good idea, but it's going to be a nightmare to manage especially when the site actually starts making money!