used or new machine, which to buy?

Hello,
I'm looking to begin a embroidery business. I'm looking at a Tajima machine. Should I buy new or used? If I buy used, can I still get tech support from the company? or, is a Tajima machine good for a beginner? When's the best time to buy a machine? buy it as a demo at a trade show?

I do have a target in mind and customers. Just need to buy a machine and learn how to use it!