Small correction: you used the diameter of the large Hyperloop design, but the cost estimate of the small one. It should be $7.5b or $1870/tube foot. Fyi there

Small correction: you used the diameter of the large Hyperloop design, but the cost estimate of the small one. It should be $7.5b or $1870/tube foot. Fyi there is a cost breakdown on pp55 of the Hyperloop PDF, which lists the tube construction costs as half what you specify. What kind of "pressure tubes" are you referring to for these cost estimates? http://www.spacex.com/sites/spacex/files/hyperloop_alpha-20130812.pdf http://www.spacex.com/sites/spacex/files/hyperloop_alpha-201...