Yes of course Telsa Motors is not neutral, but they did cite their sources and the few numbers I went after on google were within reasonable bounds of what the paper said.

Electricity transport is not that costly (around 95% efficient IIRC) and also not mandatory (eg local production).

Batteries are of course the current hot topic (cost and storage capacity per mass/volume), but some EV models have in car fuel-burning generator that generate electricity to extend range.