what is the least expensive welder i can get away with ?

I weld for a living and we use all miller euiptment. I have my own miller 110 v model 135 (replaced by the 140 now) for home use. I got the welder,cart and small bottle for $900 8 yrs ago and use it weekly and have never had an issue with it. Run the 75/25 gas mix and .025 wire for sheet metal work. Stay away from inexpensive 110v machines with switches for settings,dials offer better heat and feed control. Buy an auto darkening hood also,well worth it .Plus the millers offer the best resale value if you decide not to keep it.