Besides OTS CFI's going to ABX/ATI and the Atlas 73 program; if you're dead set on K4 you can come in as a Lear/Falcon 20 pilot for K9 and "flow" to K4 two years later, IIRC the Charters operation is week on/week off or 2 on/2 off if that's the schedule you want, if you're trying to stay in YIP/PTK/DTW you can go to USAJet or IFL group and fly MD88's or 727's and try to jump over once you have some jet time