The Most important thing about Guedelon is probably not the site chosen, nor the individuals, nor the techniques of battimente. It's the idea that it's a collective effort and of course if you're going to have a successful community you have to learn how to work together. The participants use words like ENERGY and ADVENTURE to describe the experience that they had and that's an indication that they were tuned in to something good.
The German site at Campus Galli is a similar project, a real medieval monastery meant to be funded with tourist dollars. There are no subs so until we consult with a native German speaker we won't know if the monastery is going to have real monks? Or is it only tourism?