Awesome greenhouse, Ken!
I am not far from Zone 10 being in Zone 9a. It will be a few months before things get moved into protected areas. We don't get many big frosts but all it takes it one rare frost and there go all my tropicals and hard work. I worry so much about my babies in the winter!
I can't imagine my worry living anywhere that gets colder?! I guess you do whacha gotta do.