Always mixed to have a child leave for college. I just sent my last one off a week ago. I was joking with him that I would move away and not tell anyone. Truth is, I am getting the house ready for sale, but I'll let him know where.
As for your daughters' comments. er, that seems telling don't you think? The oldest is obviously angry at her mom, the next doesn't want anything to do with the situation.
I remember you talked about living arrangements. Don't you think it would be better to get full custody of your son rather than move in with his mom? That doesn't seem to have an upside from what I can see (based on what you write).
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."