How much would it cost to have someone fix the wiring in my car's headlight?

I know there's a lot of stuff wrong with my car, and I know I need to get it fixed. However, unless I win the lottery anytime soon it's not going to happen.
My cars engine has been overheating, and because of this issue the wiring for the right headlight has fused together. My car is a 1996 ford escape, if that helps any.

You car overheating didn't melt the wiring. Get a light harness at a salvage yard and splice it in.