I’m building a small, 1445 sq ft, simple, rectangular home with shed roof between Merced and Sonora, in central valley/ Yosemite area and have been lucky enough to secure a good contractor, but he has zero green building experience and I really do not want to lose him, or compromise, over my energy goals.

He is very reluctant to try my insulation plan, and thinks subs will refuse.  My plan is a hybrid of traditional Batts and  Rigid foam insulation on the exterior side of wall sheathing and Rigid foam insulation on the exterior side of roof sheathing.
Update:
My plan is to use faced batt insulation in 2×6 walls and cathedral-type ceiling for R-21
Add Polyiso rigid foam at R 6.5 per inch
Ext wall sheathing 2 inches for total R 34
Ext roof sheathing 4 inches for total R 47
The shed roof will face south and have 20 panel solar array. Planning cool roof shingles.
I am building below the snow line, due north facing, minimal windows, biggest factor is heat–and heat is expected to increase significantly in the short term.

I need a subcontractor who could just do the rigid foam. Or someone I can hire who can come up with a better idea and design for me, or a way to make all decisions in advance (innie versus outie, box or frame etc) and create a step by step plan for my contractor . Getting desperate.