Boring company tunnel should be 17 miles long in a year
cnbc.com
cnbc.com
The tunneling part is actually not that costly. When we think of big expensive subway projects and the like the major cost component is the stations. Still I hope he shows that vertically integrating the whole project and running continuously can drive down costs. The Spanish have shown similar results in the past (before their economy blew up).
https://en.m.wikipedia.org/wiki/Cuius_est_solum,_eius_est_us...
I'm also interested to know if this is in a right-of-way or Musk is buying rights from individual landowners. My guess is right of way.