Extend or Not

A couple days ago we got an offer to extend our rotations here in Sunnyvale. It's been a tough decision and I'm still not certain on what to do. With twins coming we really need the extra money. With the market the way it is we're probably going to end up taking a loss on our house... but we really could make it work there, albeit a little cramped. So is the extra money worth staying here and missing family and having the twins here in CA.