I've posted some time ago we should not forget his 5 sons when considering how much Elon may accomplish in his lifetime.
I.e. there is a good chance that one or more will, after schooling, join Dad at one or more of his companies and be groomed as trusted lieutenants and innovators. His twins are now 15 - 16 years old and the triplets 14. I ran across this Cleantechnica piece that strongly suggests this will come to pass. Musk set up an unconventional school for his sons and children of some employees six years ago. Hmmm, do you suppose reasoning from first principles might be on the curriculum?
First space, then auto—now Elon Musk quietly tinkers with education – Ars Technica