If I understand the connections, they seem to require precision. The timber looks expensive, and like it is from old trees.
This gives me pause,as I would be afraid of wasting either the money or the, excuse the expression, life force , with novice efforts.
The foundation, on the other hand seems achievable, and in fact,inexpensive compared to a Portland cement foundation.
I would love to see the stone working tools you use.
Actually I would like to see all of the tools you use. Second to the stone work, the lay out tools, those used to craft and orient the site itself are the most intriguing.