The question was about how to heat a home, not how to keep your body warm. Good info on how to stay warm to stay alive, but if she can't afford a K heater and a couple of gallons to fuel it, she is in serious financial trouble. I've had the same K heater shown above for more than 20 years. That's $8/year. One plus is you can heat food on it too.

One note about the weather forecast. Earlier in the week we were forecast to get 16" of snow between Sat and Sun and now it is "up to 3 inches."

Maybe it's my generation and growing up where tornados were a thing but keeping a few essentials light kerosene lanterns/heaters, coleman stoves, a chainsaw and fuel, etc was just common sense. Heck, I've got half a dozen coleman stoves here.

Have any candles? Cheap heat

Several candles will bring up the temp of a small room.

Another play on the alcohol heater is a better coffee can if you can find one. Tp acts as the wick. The large ones you put 3 rolls of toilet paper in. Small a single roll. Just top the can off