thanks Dan.
In my case, the foundation wall was already there, the tiberframe was designed around the existing footprint. Portion of the curtain wall/foam/strapping/siding all overhang the foundation, about 9". I wrapped the entire foundation with 4" R20 of XPS, which reduced it down to about 5" overhang.
I recommend getting the PEng. stamp for a project like this. What they say goes, they're above the law smile It'll make the journey much more enjoyable.. lol
The quote I got for roof Sips alone was over 20K, I don't think I have half of that in roof/walls/floor foam.

there's a thin line between hobby and mental illness