I won't say much since this has a lot to do with how they deal with snow in that area and I don't live there. But a more general question is has she ever driven in snow? 4 WD is often overrated as a snow and ice solution. If the tires are getting no traction then it's just "4 wheel slide". Also, even with enough traction you need correct driver response. It might be a fair argument that FWD with Blizzaks or studs is the best answer for the inexperienced driver. And if the conditions are worse than that, then just stay off the road. IMHO.

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra