I am a devout DIY'er. Suggesting a consensus sounds good on paper but it would devolve into a convoluted never ending post as we all debate the pro's and con's of what's best. I can tell you without a doubt that I followed every best practice, best products, I could as I built my van. Or I compromised for the best of reasons at the time.
All you can do is read and read some more every thread you can find that is relevant to what you are trying to do. But invariably you will read a thread that has some awesome ideas, right after you have finished that aspect of your van. As my van approaches completion it is obvious to me that I would do a few things different. Different in design and different in materials used. It is a never ending evolution of ideas and products.
There is always someone trying something new or improved over the "accepted" way. Which is what makes us come back even when we are done. To dream about the next build.
I read everything I can, then apply some critical thinking to see if I agree with what I've read. Seeing all the methods and products chosen, good and bad, helps further my understanding of what I ultimately will build. I would find a consensus boring and quickly dated. Enjoy the search. Even the worst conversion might have one really good idea you can improve on.