Used or New Car Purchase

A used Toyota hybrid. You can buy a car like that with nearly 100K miles on it and drive it for at least another decade.

I'm not sure that it would be worth the hassle to change vehicles. I recently took a 2200 mile road trip, so I was super charging the entire time. The average cost came in at $0.10-$0.11/mile. Granted, that was about 90% highway driving, so probably less efficient than all city or mixed city/highway driving. If you managed to get a hybrid that could consistently get 50 mpg and regular unleaded was at around $4/gallon, you would be looking at a fuel cost of about $0.08/mile. But the gas powertrain in the hybrid would potentially have higher maintenance cost associated with it (oil changes, air/oil filters, spark plugs, belts, etc.).

In that comparison (inefficient mostly highway driving with an EV, versus more efficient mixed driving with a hybrid) you would optimistically save around 25% in terms of fuel cost. Unless you drive absolutely ridiculous number of miles per month/year/etc, you are very likely to take a long time to break even just on the fuel cost. Plus, if gas prices go up even a little bit or if you get a vehicle that isn't as efficient as 50 mpg, the calculus changes unfavorably. I used $4/gallon, as that's what I happened to see regularly on my recent road trip.

However, according to AAA, the current average price for gas is $4.31/gallon. At that price, and with a 40 mpg fuel efficiency, you are looking at $0.1078/mile fuel cost. Basically, it is the same fuel cost as charging an EV at public super chargers all the time and driving mostly on the highway, which is about the most expensive way to drive/charge an EV.