I am so sorry that happened, but you are right - you are so lucky. I have an idea that might work temporarily. Cattle panels are available at your local farm stores any time. If you pick up 8 steel fence posts and pound them into the ground, 4 on each side, then arch 3 cattle panels between them, wiring them into place, you would have an inexpensive enclosure. Cover it with chicken wire, then cover the entire thing with clear plastic. Plenty of room for 10 chickens in there.
We use this as our run, and covered with clear plastic it absorbs the sun's heat during the day. Our run is always warmer than our coop, and my chickens are in it all day long except to lay. They are dry and out of the wind. Snow slides off. You could put a couple of roosts in there, maybe slap up a plywood shelter if you would feel better. It would be fast, inexpensive, and when you are able to rebuild your coop it would serve double duty as a sturdy run, just butt your coop up to it and have your pop door open into it. That would save a few bucks.
Inside is bright and sunny - and warm. So warm, in fact that you can see our brooder pen with chicks on the left and it was in the teens and twenties out there.
Our run and coop. See how the panels are arched between the fence posts?
Snow load in winter - and here our winds are always high...not unusual to have 60 + mph. Snow slides off with the gentle push of a broom if it snows heavily.
Complete information can be found on my Coop Page, right there under my avatar. I'll bet this would work well and serve double duty after you rebuild! Mine are out there even when it's 20 below zero! Good luck!
Edited by Blooie - 1/11/16 at 10:21am