Have to add my two cents worth. Get the best you can afford - Hobart, Miller, Lincoln, ESAB. And get one that will mig and flux core. A gas bottle shouldn't even be a consideration. Most folks go thru less than a bottle a year, and that's the small bottle. As a 20 year welder in shipbuilding I can tell you that if you're new to welding, you'll make out much better with mig on sheet metal. You'll get better penetration at a lower amperage than with flux core. If you can afford it and have the connection, get 220. But 110 works for most light duty jobs.
