nevada I have been doing 50/50 custody in the same house with my ex with no child support being paid. I have a significantly lower income as I am on SS and a small pension. my question is this, she is going to move out now and wants to trade the kids every other week. there are 3 children that will be going back and forth but one, a 16 yr old will be staying with me full time. Do they calculate the one child with me as the primary and then separately the other 3 as joint?