How much snow do you get? I keep suggesting the portable "garage" to hubby to store our extra "stuff" so the garage won't be as crowded, and he tells me that they simply won't hold up in snow country... though I do see some here and there. I think the most stable ones are the quonset style. I have a cattle panel coop (my old one) and that can be totally buried by snow, and will not collapse b/c of the framing and ridge pole I built for it. Same with my CP green house. Maybe you might consider building with cattle panels. What size is your current run?