I settled on the Velo Rossa kit from John Washington at Reaction Research because of the low initial cost. I have found John to be nothing but helpful since the day I first inquired about this project. I purchased the install manual three years ago, but didn't purchase my kit until April 2008.
I purchased a non-running 260z donor for $350, and spent a year getting it ready for the kit. I sold off all the parts I don't need. I actually made a profit of $25.
If I hadn't had to replace the rusted floorpans ($270) I would have started way ahead.
I picked up my body kit from John at the Knotts Berry Farm Kit Car show last year. No crating cost, no delivery fee, just gas for my pickup truck, from Northern Cal and back. $4500 total.
I've spent the last year fitting panels, cutting and sanding... fixing my mistakes... and then redoing it the correct way. My plan is to do the basic bodywork myself and get the car into primer. Then install all the exterior lights. Then I'll move on to drive train (SB Chevy using JTR conversion), suspension and interior. Once it's a driver, I'll strip it down and send it out for paint.
To date I have around $5700 invested in the project. I'm estimating at least another $5000 before wheels and paint, but that will be spread out over the next couple years at my current rate, so it won't hurt too much.
Here are a couple pics of the donor 260Z.