She is "rich" by any reasonable standard -- I assume her net worth is in the hundreds of millions of dollars. She could presumably self-fund a reasonable company for years without affecting her assets substantially. (There may be other reasons why she won't or can't do it, but $5-10mm isn't one of them.)
“My proceeds from the PayPal acquisition were $180 million. I put $100 million in SpaceX, $70m in Tesla, and $10m in Solar City. I had to borrow money for rent.”
