The BFGs ATs have served me well in the nasty crud we have up here.
My local mechanic does a lot of tire work. A lot of times, if someone is buying new, and the old tires aren't too bad, he will pay a bit to take them and resell them.
When I first got my truck, one of the rear tires split in the sidewall. He had another similar tire used, and was pretty cheap. Might be able to find a place that deals in used tires, and either buy them flat out, or offer a trade for the tires that are on there now. Even if you can't get snow tires, maybe you will get lucky and find a set of soft all seasons with some good tread. Never know, its worth looking into. Could always go to a J/Y and go hunting for something with decent tires that will fit the car. I've seen cars junked with nearly new tires. Just have to keep a keen eye out for them. Even if you have to pay to dismount, and remount them on your rims, you may still come out a lot cheaper.
2004 Buick LeSabre Custom FE5 GXP suspension conversion. 170Kmi
2001 Silverado 4WD 5.3L, 33" BFG ATs, Z71/Z82 pkg, 147kmi.