Interesting that he refers to his money, not the company's. Rather than a buyout, my best guess is he's investing a bunch more cash in the company to help fund its next efforts (superchargers, model X, whathaveyou). This is after the company paid back its loans early. If true, it means he'd rather own more equity than let the government fund the effort at an interest rate. Pretty savvy as long as his bet that Tesla succeeds wins (which like most on here, I strongly suspect he will win this bet).
Other funny thing about the way he says this is that Elon has always put his money where his mouth is. He made huge personal investments in getting SpaceX going and keeping it and Tesla going along, to the point of running out of cash. (Which is way different than being broke BTW especially with all of his equity in these companies, but still pretty amazing.)
