$2.5bn/mile? Euh, sorry, I don't think it costs this much. "Get your shit together", the world will not wait. There is a reason why I go vacationing in SEA and not in Europe despite proximity.
The crazy part is partly we don't know for sure why it costs this much in the every US project [1]. A deep dive into details shows a thicket of intertwingled challenges [2] that are solvable by goring an army of oxen.
