https://savingjournalism.substack.com/p/i-talked-to-elon-mus...

This is what I could find with a quick search regarding what Elon himself claims. I had a skim and it doesn’t seem to necessarily contradict the article I linked or my summary (perhaps depending on your definition of ”good money”). There probably was an emerald mine, and yeah it probably didn’t yield enough for Musk’s father to have the family set for life or anything like that.