green house looks great ,as for wind problems i have not had any my large 1500sq feet greenhouse worried me when i first had it put up and i have since built a small 300sq feet as a cold frame using pvc pipe and have had no problem there either ,its a very stable design ,however watch snow loads!on larger units with a double skin and a air cusion layerwhen snow builds up flip the air off for a minute and then flip it back on and turn up the heat for some melt. the snow is another reason to make the angle of the green house more eliptical than round or use an angle peak . honestly this design is the easyest and cheepest thing you will ever erect