Obviously Musk is starting an attempt to do to tunnelling what he has already arguably done for rocketry and is attempting to do to EVs: commoditize the technology and drive down costs by radically re-thinking the engineering and design of the systems involved.

Your entire post lacks vision because it assumes fixed costs. Also, where did you get the $150M/mi from anyway? Your whole post seems to stem from a fixed number you pulled out of thin air.