The big question in this plan to Mars is where can such a huge rocket launch? It will be very hard to get permission anywhere.

Maybe this is the answer.

Elon Musk is a Bond villain. Tweet from Elon Musk.
"If this works, I'm treating myself to a volcano lair. It's time."
Elon Musk
https://twitter.com/elonmusk/status/...999744?lang=en