What I don't understand is why none of the printer kits are mentioned. If you are mechanically inclined, can solder and in general are a Maker/Hacker there are numerous rigs out there that are totally open source that you can either build from scratch using build lists and instructions or complete kits that come with everything in the box. I chose the middle and got a Rigidbot Regular. It came with everything except the Power Supply and Main Board, and I have been happily modifying it to meet my requirements while printing my tail off.
Just check out RepRap.org or the Google Groups under 3D printing to find different machines and designs, or come on over and check out the Rigidbot group (It is the largest and in my opinion, best documented and most helpful)