B&B, compared to my two puny 10x12' greenhouses, your greenhouse is huge! When I built my first lean-to GH I was limited to 12' because is had to fit between the corner of the house and two AC units. I could have built the free-standing one about any size I wished but thought it would be more aesthetic if it was the same length as the lean-to.
They are parallel GH's.
Unfortunately I had to leave out dozens of aloe vera, jade, rubber trees, and schefflera and a huge peace lily plus two 6' Madagascar dragon trees. We got down to 26 F this morning and I have probably lost half of what was outside. I will check when it warms up a bit this weekend and see what damage was done.