Greg, It's a little hard to estimate because all of the parts were hand made. Nothing was bought in a store, and all the CNC machining time was donated by the guy that actually made all of the parts. I can give you the following list, but I don't know if it will be a lot of help.

1/.. 300 hours of engineering design, and CAD work.
2/.. 300 hours of fabrication time.
3/.. Maybe $1000 of material and parts.
4/.. Maybe $10,000 of donated time on a CNC machining center, and a CNC turning center.

Brenner ...