[jeff s]

When there's over 80k in parts, its hard to build a complete project for 100k.
We had a couple freshly pro-built cars come in that didn't drive right, terrible handling, braking, over heating, etc. Owners spent another 15k to get it working right. My best customers are those who've had at least a couple cars built elswhere.
When I built Cadillac Attack as a home builder in 1994 in my garage, sending out only the paint, seats, I spent about 3 times what I figured, 45k.
Lots of good points in this thread.