I use a Miller251 mig welder with a tweco 300 amp gun.

I know where this welder can be purchased for like $1800 if I remember right.. Place is in Ohio and the guy sells them on ebay.

Its a good deal..

Learn to weld with .035 wire on heavy steel.. 17.5 to 18 volts @ 220 IPM or so.. once you can weld at that, start practicing thinner and lower power welding.

Stick with Miller or Lincoln for welders. Hobart is ok.. Miller is the best and most widely stocked.. Easy to find parts.