Millermatic 200

I'd still go with a Hobart.... it's a good solid built unit for probably half the price of the Miller, welds just as good too... can a Miller weld sheet metal? Yea... but I think it is over kill and I think you would find a smaller unit like the Hobart to be MUCH easier to use and turn out awesome welds... I use a small unit like this on all of my metal work and it isn't "stuck" together hot glue gun welds lol.... it's all in the hands of the welder... the guy behind the trigger that is :)

http://www.ebay.com/itm/Hobart-Hand...90668128194?pt=BI_Welders&hash=item2c64b4bfc2