You're correct that Musk isn't a "billionaire heir to an emerald mine" but his own father has said the emerald mine was real and that it helped pay Musk's living expenses at college:
> Errol went as far as to say that emerald money paid for his son's move to the US, where Elon would go on to attend the University of Pennsylvania's Wharton Business School on scholarship — with, apparently, emerald-generated cash in his pocket for living expenses.
> when he badly needed money at the beginning of Tesla and SpaceX there was certainly no secret backup of "Emerald Mine" money
That's not personal wealth, that's company investment. Just because you (or your family) doesn't have spare money kicking around to finance a space rocket company doesn't mean that you're not personally rich and able to pay for things "regular" folks cannot and have connections they don't.
> Errol went as far as to say that emerald money paid for his son's move to the US, where Elon would go on to attend the University of Pennsylvania's Wharton Business School on scholarship — with, apparently, emerald-generated cash in his pocket for living expenses.
https://futurism.com/elon-musk-dad-emerald-mine
> when he badly needed money at the beginning of Tesla and SpaceX there was certainly no secret backup of "Emerald Mine" money
That's not personal wealth, that's company investment. Just because you (or your family) doesn't have spare money kicking around to finance a space rocket company doesn't mean that you're not personally rich and able to pay for things "regular" folks cannot and have connections they don't.