Depends on driving habits and price of electricity and gas. In Washington state, electricity is cheaper compared to most of the US, and gas is among the most expensive compared to most of the US.

For less than ~10k miles per year, the higher up front cost of an electric vehicle and the greater depreciation due to eventual battery replacement might make a hybrid gas vehicle still cheaper per mile.

But for high mileage, high frequency of stop and go driving, I imagine all electric is cheapest?

the problem is we aren't comparing person vehicles, you have to consider these vehicles are estimated to need a 20+ year life span which mean replacing the batteries at least once, most likely twice. electric vehicle metrics are also not based on carrying a heavy load, at start and stop distances, moving at too low a speed to really benefit from reclamation.

The truth is, we have no real data to tell us how electric vehicles will fair over the expected time length with this expected work load.

When you factor in the building of instructor for charging stations, and their maintenance.

The initially preceded benefits may not be there.