Nice setup. I don't think any greenhouses with plastic sheeting would last even a year where I am due to our high winds, but I like your setup.
Discussion
It gets pretty windy here, it’s never budged. The most damage I have had is from keeping some spare roosters out here over the winter. The Quonset hut style is pretty wind resistant. This is 6mil greenhouse plastic.
I put plastic on a cold frame that I used on one of my beds. It was thick plastic, but it was shredded after a couple of months. Of course, where I live, in the winter, it isn't considered windy until it gets over 20 mph. 60 mph winds are common. Driving on the interstate we see semis blown over multiple times every year. You quickly learn to park facing into the wind so you don't have your car door caught by the wind and the hinges bent.
The joke around here is that when the wind stops blowing, everyone falls over because they are so used to walking leaning into the wind.
Yeah it’s not quite that bad here. 20 is normal, sometimes 35 happens. I’m at the top of a ridge just east of a big farm field.