I've wanted to buy mill for years now and may soon be pulling the trigger. It would be for hobby development and prototyping, but if a design bears fruit I'd like to start a business with it. My first consideration was to buy a new Taiwanese manual mill and convert it myself. I figured this would be a safe bet, considering I don't know how to properly inspect a used mill, the cost is in my price range and it would be a good way to learn the ropes. Then I figured I'd at least look at the used market and found a 1998 Haas VF-3 local to me and for not much more than I was planning to spend on the little bench mill + conversion. How in over my head would I be to try to start out with something like that? For my background, I was an aircraft mechanic for 8 years, now attending college for a mechanical engineering degree.