My though on learing o/a welding and mig is that with o/a you can do just about everything that you may run in to hobby wise and if you go GMAW (aka Mig) thats one machine to get and if planning to do small-medium production work going to run about $1000-1500 usd (rough guess)
GTAW (Tig) is great to know but IMO thats another chunk of $$ to sink in to another machine that wont be used often, o/a going to cost less then a decent Tig box, plus o/a can be used for cutting, basic pre-heating, welding and brasing/soldering as mentioned |