I already did this calculation in another thread a while ago. An EV becomes cost effective when gasoline goes over $1.80 per gallon . That conservative example uses the Nissan Leaf which is about the cheapest EV to operate. Considering the cost of the lithium ion battery and its limited cycle life which millions of people are in denial about, it is cheaper to drive a hybrid like a Prius compared to just about any EV.
An EV with lithium iron that has many thousands of cycles may be a different story. But lithium iron may still have limited longevity due to age, especially in a hot climate, so the EV would have to be driven much more than the average car to make use of it. It would be a good choice for commercial vehicles.
If you look at used EVs, most of them have well below the average miles given the age of the vehicle. There’s a reason for that. It is impractical to use one for long trips or to keep it on the road all day doing deliveries.