It sounds like you will use the wire feeder, I don't have one. I do have an oxy-acetylene rig that I am getting used to using. I don't know about the coat hangers, you might want to get some welding rods. I found this video of welding sheet metal with oxy-acetylene, looks good. Welding starts 20 minutes in...
https://www.youtube.com/watch?v=hHR2BoVrWlg