Oxy-acetylene is versatile, but causes too much warpage for sheet metal work. Would be useful for leading body seams.
I have a lot more time than money. I did warp a lot when I first started, but now I do pretty good. Just have to walk away a lot and let it cool. A wet rag helps some too. It does work for me. Of course I'm not hanging panels.
I have mechanical Aptitude. I can screw up anything.