With her current use profile, and summer temps, and so on. If she were to suddenly have to start driving longer distances, or you lived somewhere where winter was 4-6 months rather than 4-6 weeks, everything changes.
I admit that, if one only takes short trips and is always home every single night, there are advantages to EVs that will never be challenged by ICE- unless one literally lives next door to a gas station, there's no refueling gas/diesel at home (other than the lucky farmers among us). But as soon as one is forced outside a radius of half the EV range, the convenience of charging at home is replaced by the inconvenience of needing to sit around potentially for hours to continue your trip, or even just to return home. Time is money, and every minute of charging away from home should be summed with actual cost against the comparison with gasoline.
Ex: If you make $100/hr at your job, and you're driving somewhere outside of battery range. In an ICE vehicle the fuel stop(s) total 20 minutes for the distance you need to travel, so time cost is ($100/hr / 20 min stop) = $33.33. In the EV, we'll be generous and say total charging time is 80 minutes, but that wasn't a full charge but instead just enough to get to your destination, since you can charge overnight there. Now we get ($100/hr / 80 min stop) = $133.33, in addition to the energy. This is one of the biggest reasons to me why non-local EVs make absolutely no sense for a business. Time ain't free even if the energy is cheaper!
I still do not understand why any manufacturer of EVs has not yet done an integration with an ICE (gas or diesel), where the ICE is nothing but a mobile charger. Running at a fixed RPM, the engine could be tuned to be extremely efficient while extending the range greatly. The other idea would be a split BEV mode, where either the EV side was prevented from assisting (anything at highway speeds), but the ICE would alternate between mobile charger (while in EV mode) and sole propulsion (highway).
There are uses where EVs make lots of sense. There are places where they also make no sense at all. In a use case like yours, build a true hybrid with both ICE and EV propulsion. Write the control software so anything below say 45mph is always battery mode, even 100% acceleration. Anytime the battery gets to say 10% and the vehicle is moving, kick on the ICE and charge until at least 30%. And finally, anything over 45mph is 100% ICE, but any extra current from the generator & regenerative braking goes towards topping the battery up. This seems like it would be an almost-unarguable solution for everyone until battery or other technology is ready to replace gasoline and diesel as the most convenient, most effective energy source for wildly varying transportation requirements.