I was in Dad's care. Dad let me do the transferring thing. But if you do joint custody, be prepared to have your kids pull similar stuff on you. Communication between you and your ex-spouse are critical here. You are no doubt going to find youself having to back his or her decisions, even if you don't agree with them.
Consistency is important.
So is not undermining your ex-spouse's authority. Kids want to be with their friends on the weekend, not in their makeshift home for the weekend. As long as a parent is in the house it is home. If they want to play with friends, they make arrangements and see them. I still have time for a job and a personal life.