Interesting numbers. My old caravan on a trip does 20-21 MPG so at our current price 3.70 I think for E15 I would have around $335 for fuel, probably 6 stops at 10 minutes each.
As for the debate on emissions, that would depend on how far you want to go up the chain. You are correct in you comparison. The cost to mine and produce the materials for the batteries, the amount of plastics in a car today may be a wash, not sure what the Tesla bodies are made of. Many comparison could be made I believe.
I watched a video of a Ford Lightning and a Chevy Gas towing identical trailers. The Ford didn't fare so well, I watched a few different videos none of them made me say I need one of these.
A former customer has a son that apparently works for Google and they gave him a big raise. He bought a Tesla it was $125K or more. He told me he wouldn't buy one but said they do take off when you press the pedal, he was impressed.