Is there a cheap way to make my jaw line 90 degrees with my neck? (Photo)

I think there are two things you could do to accentuate your jawline based on your photo. The first is to place a chin implant since your chin is a little too far back. This is partially what is giving the appearance of extra soft tissue under your chin. The second is neck liposuction to remove the extra fullness after that. I'm not quite sure if you are wanting a more defined back of the jaw or not, but adding mandibular angle implants can widen that area as well. 
All of these things can be done under local anesthesia in the office. You would have some swelling for a while afterwards, but downtime overall is about a week. 
If you didn't want any downtime, there are some injectable options which may or may not save you much money (especially since it isn't permanent). Hyaluronic acid fillers like Voluma can be used to bring the chin forward and back of the jawline out. Kybella is an injectable substance that melts fat and can be injected under the chin. 
Best of luck to you,
Sarah Saxon, MD