IMO, buy the most powerful machine you can afford, I can't see as a hobbyist that duty cycle matters much, and forget anything flux core I have a hobart 140amp 120V mig (for 20+ years, and exceed the duty cycle all the time) With the cars, I find myself using the Hobart the most often.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
