Don't we already have a wall on a majority of the border, and there's no TPP to end if we don't have it. No war is also easy if you're not a warmonger.
So some of those are easy.
But I-70 to San Francisco built in 4 years? LOL!
I'm dreaming, it could be done if enough man power was available.
The most direct route would be through Yosemite. LOL, not happening. Also, there just isn't very many people between CA-99 and I-15 there. CA-99 might become an official interstate, but not some crazy route east of there.