Interesting link. I think I would like to start out a bit smaller first, like say a Smith & Wesson 9mm auto frame to get some experience first. Plus, cheaper prices on the blueprints since I would be interested in more than one model to work on.
3d printer prices are falling and so are 3dmetalprinter prices and 3dmetal, scanning, milling, and printers. see Kickstarter and indiegogo