For about 20 years, I had to drive Company Cars with NO SNOW tires, in every kind of bad weather. (freezing rain, ICE, Snow, Sleet, Rain, etc.)
On the rear wheel drive vehicles, I would visit the parts dept and load up the car with all the really HEAVY parts I could find, and then drop the tire pressure on the driven tires and then go on as usual, but maybe at lower speeds.
On the FWD cars, in later years, It's almost impossible to put more weight over the driven wheels, but you (I) can still drop off some tire pressure to get more rubber on the road. Flamers...don't bother! I've done it more times than I can count and "IT WORKS GREAT!".
I do the same thing here in FL. when working in this danged Florida Sugar Sand. At 18-20 psi, my Kelly Explorer tires work like tractor tires.
If I had to take a trip up North and got caught in a snow storm, I'd do the very same thing.....drop off some front tire pressure and then slow down and drive defensively.
I have no doubt that my Gertrude would do just fine in snow, without snow tires.
I carry a small 12 volt air compressor in the back of my car, so I can restore normal tire pressure when I'm back on dry pavement.
It's just a thought......
EDIT: Block heater? Never had one. I did use a Dip-Stick heater some, years ago. That's only marginally effective.
At -40 degrees with a high wind, I did put a 1000W electric heater directly under the oil pan on my car. That kept it toasty warm all night.
I had NO garage or even a car port to break the wind. My cars always had to sit out in the open, in my driveway.