[powerslave12r]

I recall in one of the interviews he said he <inexact quote, summarized>

"I do appreciate money and it is needed to invest in ventures, but I personally I'm not in it for the money. I can already buy everything I could want."

EDIT: I am just supporting parent post's claim that

"but frankly I would respond by pointing out that Elon really doesn't seem to be in it for the money, but rather despite the money."

[dkokelley]

That would imply that in his personal life he does not need or want more money, since he is already incredibly wealthy. However, personal wealth will not be enough to fund SpaceX indefinitely. The system needs to be balanced.

[jlgreco]

SpaceX has been profitable since 2007.

http://www.spacex.com/usa.php