This is very cool, but my understanding is that Plywood outgases Formaldehyde. Wouldn't that be a problem in a home constructed from that much Plywood?
This depends on the kind of adhesive used for creating the plywood. But yes, you are right, essentially everything outdoor-usable (A100 or AW100) would contain formaldehyde. IIRC only IF20 plywood is made without formaldehyde.
I would expect that, with proper roofing and siding, the structural frame would not need to be made from outdoor-usable plywood.