Interesting and ambitious plan. The environmental benefits of electric cars really depend on the energy source. As the following article demonstrates if electric vehicles are charged via a carbon intensive grid then they may not be as efficient as you might expect. http://www.gogeteco.com/electric-commuter-bike-vs-tesla-model-3/

This article compares the energy efficiency of different modes of transport including walking, riding, cars, trains, planes and electric vehicles. It suggests that electric cars are only marginally better that modern jet airliners in energy efficiency if you use carbon based fuel to generate the electricity. Interestingly electric pedal assist bikes turn out to be 10 times more efficient than electric cars.