I think your assumptions
I think your assumptions matter less than your math. Plug in whatever costs and look at the difference. Your costs look a little biased toward the Tesla, but a even a 10% lower cost of ownership and operation is hugh in the transport business. The arc is bending defiantly toward electric trucks and should have been the starting place. More room for batteries and much more reliant on torque to get the job done. this segment will convert to EV faster than passenger vehicles, and you've analyzed the why.