how bad is winter for an old car?

I have mine tied to the tree's around it and tied to my tool box one one side and a pallet on another side, when the wet cold weather started moving in I put a vapor barrier down under her, Mine has windows that can be opened for ventilation and it went through the worst ice storm we have had in years last year, I do not have a shop yet so this worked good for me.
My 66 Valiant did not have to be out in the weather last year and for $200 it was well worth it.
And I enjoyed keeping her in it this summer to keep tree sap and bird boo off of her. staybild in the tank and on nice days I open the window and door.
It has already paid for it's self

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