I know that you can print the plastic parts that hold together the various bars. As a matter of fact, the AO-100 printer I've looked at has printed parts holding it together. You'd need to buy motors, the arduino clone they use, and other stuff like the heating bed. I don't know how heavily modded their motherboard is though. I suppose you could get some parts elsewhere, or get them from the source.
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I know that you can print the plastic parts that hold together the various bars. As a matter of fact, the AO-100 printer I've looked at has printed parts holding it together. You'd need to buy motors, the arduino clone they use, and other stuff like the heating bed. I don't know how heavily modded their motherboard is though. I suppose you could get some parts elsewhere, or get them from the source.