I know exactly what a movable hoop greenhouse is; however, I am not sure how you might use PC.
Are you thinking the skirt wall is PC?
I could imagine a mesh attached to a welded wire frame (like cattle panel) then sprayed with PC. Since the greenhouse heat loss is the least if the air movement can be controlled, the PC could be thin, hence lightweight. Then the greenhouse motion would include the PC skirtwall.
Good luck if you proceed. I look forward to postings because I am in the process of doing the same thing come spring in the Colorado mountains.
gary
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