Back in NC I used a mig for just about everything, but if you can afford the unit that has both mig and tig that is the best way to go. I had a Miller but you can get great deals on the Lincon stuff and you may be able to work some kind of deal with them at Lincon. They are very cool people. I had a Lincon Plasma cutter and it was totally auwsome.
The guys in WV used Arc welders for everything.
Jim