Knowing a little about your homestead location, I suggest that you look for the strongest structure possible, due to snow loads. At my old house, I tried a hoophouse, which was fine during the summer. I did heat it during the winter (no choice when the outside temp is -40 F). Even though it was heated, a heavy lake effect storm still managed to collapse the structure. So, Plan B was a small homebuilt greenhouse, which used recycled windows, and a polycarbonite corrugated roof. That particular structure is 15 years old and still standing. I put in a brick floor for thermal mass, which I'm considering to do here, as well.
Part of your decision will be your budget, the monetary budget and time budget, with tradeoffs between the two.
I went with the hobby sized version from these folks:
https://migreenhouse.com/greenhouse-products/simply-solar-greenhouses/. I was looking for a structure that was absolutely weather tight. The base of my particular greenhouse is buried in the ground, which reduces the possibility of vermin, snakes, insects coming up from underneath. I'd look at durability. Automatic vents are an excellent idea. One of the reasons why I went with fiberglass is the ease of repair; I keep a fiberglass repair kit in stock, in case something does happen. When glass breaks, it can be a pain to repair, while the newer plastic glazing is much safer. The small and mid-sized fiberglass greenhouses are one piece, the installation time is maybe 2 hours, and the manufacturer does the installation, so no exertion required on my part. Also, because it's one piece, there are fewer air gaps, so it's easier to heat. It can also be moved, if the chosen location doesn't work out. And, it has tornado proven durability.
Bottom line, how much time and money do you want to invest?
