Would ex get joint custody if he expects his mother to have the kids on his time?

I am in the process of creating a new parenting / custody / child support agreement, Ex currently does not have joint custody because of his hobbies and work. He wants to make it joint custody (I say because he doesn't want to pay the amount of child support he is suppose to pay) but what he wants to do I think is wrong. Since he is a spoiled POS of course his mother would help on this. He wants to have the boys every other night during the week, wake them up at 4am! and drop them off at 430am at his mom's so she can get them up at 630am and get them ready, etc. and drop them off at daycare at 730am before she goes to work. It is not her responsiblity and I don't think that is fair at all to my children to mess their schedule up like that. Would a court award him joint custody with this agreement? I think that is completely absord! My poor child need structure and I do not agree with them waking up one day at 4am then the next at 630am. I am NOT getting up at 4am every day so my kids could stay on that schedule plus they would want to go to bed at like 7pm if they did get up that early. so he says that would give him extra time with the kids but how is that? When they would want to go to bed at like 7pm instead of him dropping them off to me at 9pm. Would a judge in maryland go along with this?