Tech Counselor Insufficient - Get an RV Builder!
I was in your shoes with my project. I had a Tech Counselor look at it prior to purchase. He was well qualified, but this was the first RV he had seen. He did not spend nearly enough time going over it, as I found several significant problems after purchase that needed to be corrected. Not showstoppers, but well over 100 hrs of rework. These were things that could have and should have been identified during the pre-purchase inspection. Some things that may need to be corrected could be so difficult or expensive that you would not want to buy the project, so now is the time to identify them!
Each RV has its share of nuances and problem areas that require the builder to get creative and to use non-documented techniques. (Non-documented by Vans, several builders have excellent websites documenting how they solved these problems). The tip-up canopy is an example. Sometimes things just don't fit like the documentation says they should in certain areas.
Do yourself a favor and find a local builder (preferably who is also a Tech Counselor) who has completed the model you're considering. In addition to knowing and judging good workmanship, he will also be able to look critically at typical problem areas to see how well the builder tackled the known problem areas.
I would also ask the builder to show you all instances where he deviated from the plans, and make sure that you and your TC are satisified with the result. Of course if your Tech Counselor also built the same model you're considering, he will be able to pick these up quickly.
Just my $.02. Good luck, let us know how you make out.