SF luxury tower has sunk 16 inches, and tilted 2

[shortshorts]

So what are next steps for this Tower? Tear down? That would cost multi millions. Fix the foundation? Probably cost a ton as well.

Depends whats causing the settlement. If it's from a transient issue (pumping) they will cease pumping and that's that... If it's from a bigger issue and settlement is foreseen to continue (i.e Leaning Tower of Pisa) then they could use similar tactics to the Leaning Tower of Pisa (lateral jet grouting to stabilize the foundation).

Serviceability issues will have to be renovated either way (fixing doors, wall cracks, etc).