The machine and tank is being offered at considerably less than half of retail. I am partial to Miller, but we have a 135 Lincoln and its a good machine. If it works, I would grab it before someone else does. As for the tank, it is a size that is sold, not rented. However, each gas distributor makes his own rules. But keep in mind if you buy a new tank for $150, the distributor will exchange it, and you will wind up with a used tank anyway.