From what I understand from my divorce, He can't make you pay to send the children to him if it was his choice to move. They may even tell him that he needs to pay more support because he is not with the children as often which means more daycare for you, more one on one time, and obviously if the children are not with him as often it cost you more to raise them. So I would look into that. Don't let him stress you out. I try and look at it like this. I do not have to share my daughter and go through all the crazy mess of missing her on holidays. I get 365 days of peace and quite from an ex husband who obviously doesn't know what he is doing to his child. Of course him and his new wife call and harrass me, but.. I have stopped answering the phone now.