Been there and never again. I used to do muscle cars out of my garage as a hobby. I worked on what I wanted, when I wanted. Once I opened my own shop, I had to take every crappy job just to pay the rent. Built the business up and guess what? Everyone made more money than me. The liability...
I am real, real, happy with my Craftsman Professional (The black and gold ones). It rolls great, pumps up to the frame on the first pump, and most important, it never leaks down!