I'm slightly skeptical that they're making this problem bigger than it needs to be.
Yes, I'll agree up front that powering all those vehicles from one location will melt the local power grid.
However..... Could they not shift some of the? Could they not install solar panels on the roof and some powerwall size batteries?
I wonder, given Must has cracked solar roof tiles, if some variant of them would not be strong enough to sustain some light vans parked upon it, allowing the car park to become a large solar panel. Also, do the vehicles have to be charged where they operate? RM is not short of land, so could disperse some of the vehicles for charging in other nearby locations.
If we wait for a magic bullet to come along that solves all known issues before doing anything, then we'll always do nothing. Change what can be changed and live with the rest.
I love V8s.... but I could love a Tesla too.