I Am Going to be fully BLUNT!!!! You NEED TO GO FOR FULL CUSTODY!!!! nOT 50/50 as you proposed... I am in about the same situation with my EX... She is reaming me for the child support because she refuses to get a job and supplort her children... Find enough DIRT on her that you can... Which shouldn't be too hard considering the facts that you posted... Build a strong case against her!!!