One option might be to start out with a used rig. But you have to be careful just like with anything else.
I started out with a middle of the road used machine that I got from a friend who was upgrading. It came with the machine itself, a cart, a 3/4 full bottle, helmet, and heavy gloves for $250. It was a good way to get started and it taught me to become a decent welder with a fair machine that I got over 10 years of use out of. Eventually the machine started needing some repairs and parts proved difficult to find simply because it was made overseas.
Eventually I invested in a Lincoln Easy Mig 180 which is the 220V version of the 140. When I built my home shop I pre-wired for an eventual 220 welder. At the time when I got it, it was the same price the 140 is now. I was able to reuse the same helmet, cart and argon bottle. But when I need parts, I can find them anywhere, especially the consumables since Lincoln is headquartered right here on the Northcoast, Cleveland, OH.