I would incredibly surprised if he hasn't already thought about similar things. I remember in an interview last year he stated that the Interplanetary Transport

I would incredibly surprised if he hasn't already thought about similar things. I remember in an interview last year he stated that the Interplanetary Transport System SpaceX is building for whisking humans to mars and other celestial objects in the solar system will be tiny in comparison to the spaceships that humanity will build in the latter half of this century. Bear in mind, the ITS has more than 3x the lift-off thrust of the Saturn V, which is the largest rocket ever built.