Yes, Colorado is considered a 50/50 parenting time state, if the parents live close enough to make it workable. However, the courts also have to let a parent move away if done in the initial parental orders, and then the court will have to determine which parent should have primary custody based upon the children's best interest.
IMO, in this case, SW could very well move back to NC, and the Court would let her take the kids with her, and there would be very little that CW could do about it. Plus, he probably didn't have the money for a big custody fight.
So I think he knew she could take the kids and he would see them rarely, and he would have to pay child support, and without her income he couldn't keep the house.
His world--this facade of the perfect family--was about to come crashing down.