For those interested, here's a build log of several larger and detail images we produced while we were working on the model:
http://tinyurl.com/3ykcwe3
As Troy mentioned we spent quite a bit of our own time on this model to not only get it right but also to test our systems for collaborating on a large complex model. From my perspective the collaboration went far better than I expected considering how little information we had to create the model.
This was really my first attempt at creating CAD ready 2D dxf exports from Sketchup and I was really happy with the lack of clean up required upon import into CAD.
I'm fairly certain that the builder and client saved far more than what we charged by heading off problems in advance. Problems that may not have been caught with a simple 2D drawing.
Robert