I have searched and cannot find any evidence that his success with SpaceX can be extended beyond the point where he had the money to hire highly qualified people. Coming up with a concept doesn't mean shit if it can't be implemented and there are plenty of instances where Elon's ideas are just not feasible. I also see plenty of forums about him firing people for criticizing him. Sounds to me like he just pays people smarter than him and hopes they are able to hammer away at a concept enough to pull it off. How many years has Tesla's FDS been "just around the corner"?