I'd shop around for a used lincoln, hobart, or miller small wire feed welder. If you don't do much welding there is nothing more frustrating than a machine that doesn't work well, and if your an experienced welder, same thing. I've used the HF etc. and also lincoln, hobarts and millers in my welding classes. Night and day difference. In fact, if you can don't go for the cheap lincoln etc. sold in the big box stores, you want one with true variable on the feed and amps, not the switched steps.
I have a Lincoln SP-135 running on a 30A 125V circuit and it does great. Also have it set up with the stich/spot welder option and gas. I've done thin, thick material, aluminum, and stainless all with great results.