Robert, I have a Miller synchrowave 200 tig-stick machine. Do you see any advantage in adding mig capability? I've stick welded steel varying in thickness from 1/16" up to 1/4" without any problem with the stick setting on the machine I have. I only use tig for stainless and aluminum.
Most of the welding is making little aluminum parts for my street rod, aluminum carts for my wife's dog carting competition and steel gates and things like that for my rural property. Once in a blue moon I build an exhaust system. The machine is only fired up about once very month or two.
What do you think?