Good machine:
You will want to get a gas bottle 75/25 Argon/C02 for steel NON cored wire. If you plan to weld Aluminum or Stainless with it you will need a bottle of pure Argon too. The cored wire works good for heaveyer metal. But not so well on fenders or floor pans ETC. For body work I use .023 NON cored wire. The 180 Has a better duty cycle than the 140 does, but either machine is fine for light work. Antispatter spray is Handy to have and use. practice, practice, and practice make perfect.
Have fun.
Kerry