Earlier quoted context omitted.
The CEO has shown willingness to fund Tesla Motors and SpaceX with almost all his personal funds. If I remember correctly, he is worth more than Tesla's debt, and unless he is somehow unable to liquidate enough assets to cover that debt, it won't be the end of Tesla.
My understanding is that the majority of his personal net worth is from Tesla (+Solar City) and SpaceX. Would that limit his ability to personally fund Tesla?
Also, much of his liquid pocket money has come from loans backed by his Tesla Stock. This could be a problem if Tesla stock price drops too much, as the stock he has pledge is required to be no less than a multiple of the money he has borrowed. [3]
Disclosure: I am short Tesla.
[1] https://www.cnbc.com/2018/04/13/equidate-spacex-27-billion-v... [2] https://money.usnews.com/investing/stock-market-news/article... [3] https://www.forbes.com/sites/jimcollins/2018/05/18/musk-has-...