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I have a small welder I purchased for 400 bucks that does all of what welderguy and kam says thiers will do. Hobart 175 .035" wheels and tip come on the machine w/ gas regulator included. I think Miller makes the little Hobart machine. I'm gonna suggest alittle more power than 85 amp machine you are looking at, especially on the 1/8" aluminum. Another note, the 175 Hobart has a dial rather than switches and will be easier to "dial" in your settings. Bottled gas was extra.
Another thought for you to consider,
John Wright
PS: I read back up and saw welderguy has the same machine I've got only one size smaller.