Are you sure you want to buy one ? The technology is still evolving and the printers aren't cheap. Have you looked into sourcing the material ?
There are many companies that will print for you, for a fee of course, but typically you could do a lot of printing for the cost of the printer. You send them the .stl file and a few weeks later, you get the part. Shapeways have an interesting business model where you can sell the part to other people as well.
And not trying to discourage you at all. I'm looking at this more closely again now too. I am currently working on some 70's era race cars for Formula D.
I don't know your background at all but for me, it's learning CAD that is the tough part. 3D modeling isn't easy to learn on your own. In fact, if you don't know CAD, I'd suggest spending your money on a course in 3D modeling would get you further to your goal than buying the printer.