Why would you build something so obtusely expensive when you have way more freedom to just do this with a plane. Just buy a 747, have the pilot go up and down, and boom. Your proposal is just wasteful (in addition to the thousand other technical problems with it of course.) But my main problem is that it's extremely inefficient and someone has already figured out how to do this.
Frankly it would probably be cheaper to just shoot yourself into actual space than to build a tunnel vertically down 2km through a mountain as proposed. Lol.
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