It is REALLY important that you word this as a family, NOT as YOU vs HIM.. if you do that tehn you will drive him away most likley...

I wanted to say more, about your daughter going off to college and needing the security of a strong family at home. About going to college with the fear that your family could fall apart and not even be tehre when you come back... Or about all your changes and how hard it is to keep those going and going to school with all the negativity...

You could go on, but I think its important to be concise... as long as its worded as him being part of the family or NOT then he's really got a tough choice (no A cake-eating anymore, he has to take B or C only)