So go hybrid
So go hybrid then. Have a nice little Atkinson cycle engine that keeps things topped up when necessary.
That way they don't need to charge everything all the time, they still use less fuel, and they pollute less. In town and city centres, it's a nice little win.
Ask the government to subsidise the costs. Put an RFP out for a suitable vehicle. We know that they'll get high usage, so maybe DEFRA can be convinced to chip in for an easy PR win.
As for the resale market - when I was growing up I couldn't walk three streets without seeing a Transit van that had plainly just had the BT logo ripped off it. To be quite frank, I think you're telling porkies...