Not a "house," but I have two condo units that could comfortably accommodate a family of 7 - 1 br downstairs, 2 br upstairs...adjoining door can be unlocked to make it like a house. You didn't specify your dates, so Jan, February are all booked but we have space after that. For more info, rates, etc. go to:
//www.ambergriscaye.com/paradisevillas/index.html