Why not send your model to a service bureau for printing? That will give you something to show investors without getting into the problems inherent in building and operating an ultra low-cost 3D printer for the first time. There are lots of people with printers looking for things to print, and they're likely to have some experience with 3D modeling as well; try 3dhubs.com to find one near you.

Andrew Werby
www.computersculpture.com