My last Fusion was AWD and without winter tires, it slipped all over the place on Toronto ice, and braking took 2x as long as with winter tires. I basically proved first-hand that AWD is utterly useless if you don't have the right tires for the job.
A FWD with winter tires will beat an AWD with all-seasons any day of the snowy week.
If you shop around you can get a good deal. When I was living in Ontario, I paid $532 for a set of 4 winter tires, and the installation and rotation/balancing was $88. This is all in Canadian dollars after 13% tax. It was again $88 when I switched the tires again for the summer. This is pocket change compared to the thousands of dollars of repairs you could face after suffering an accident in the snow due to loss of control. As is the rule of thumb, USA is cheaper than Canada so you should have no problem finding an even better deal!
If you're skilled at replacing tires yourself, then investing in a set of spare rims would save you a ton of time (no waiting at shops) since you can leave the winter tires on the rims.
My precious: 2013 Fusion Hybrid SE Ice Storm - Luxury Package (Dune), Navigation, Tech Package, Active Park Assist, Moonroof (ugh), 18" premium painted luxury wheels. Built in July 2012, bought CPO (former demonstrator) in May 2014. 6.3L/100 km lifetime fuel economy
Current temporary ride: 2003 Lexus LS430 w/navigation and parking sensors. Bought in December 2002, selling when I graduate