That eVent bonded to Dyneema fibers [without the Mylar I assume] sounds like one heck of a good tent fabric.
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Poles breaking; The only time I've had it happen was on Kodiak in what was 90 mph winds. It was those fiberglass poles with the cast metal ends on a 6 man Cabelas guide tent. One of our guys must have pulled out letting the one side concave enough to snap 2 poles. We had cots, so we wedged the cots at a 45 deg angle against the concave and rode out the night like that.
I think we are talking about a much lower quality product when comparing tents like the Cabelas and the NF to Hille or Warmlites. I sent my Cabelas tent back and got the Aluminum pole version and have since used it with no problems. I did duct tape each pole crossing, and reinforced some of the crucial guyouts- no problems. [Hat tip to the Island Air guys for that advice]
Taping those pole crossings increases the strength of those tents a lot. Just an idea; Another option might be to buy a tent like the NF tent in Brwnbears pic, or Cabelas, etc and buying a few more matching poles to double them up in critical spots. That plus taping would make a cheaper tent pretty bulletproof.