Gee.
Wonder where the money for it came from.
Probably sees it as his ‘fair share’ and his ‘due’ for his ‘brilliant management’.
Well, there's a good bit of ignorance rearing its ugly head on this thread, but I'll pick on you. ;-)
Tesla CEO Elon Musk makes just $33,280 a year; has option to buy 5.27 million sharesFrom: http://green.autoblog.com/2012/08/16/tesla-ceo-elon-musk-makes-just-33-280-a-year-has-option-to-buy/
He's not cashing in on Tesla, he's a good CEO who'll only make money if the company succeeds. He's also the founder of SpaceX, which is doing very well and making a good bit of money, and will also provide manned trips to the Space Station in a couple of years.
Musk is the founder of PayPal, and mainly from the sale of that company already has a net worth north of $650 million. I think he can easily afford a $17 million mansion.