I think it's fair to say that an extra marginal tens of millions of dollars or so will not affect Musk's life in the slightest. I find it hard to believe that Musk is motivated by money at this point.
He was always like that, which is why he did two internships in one summer and dropped out of Stanford to founded Zip2. He slept in the office. They had one computer, so it ran the service during the day and he used it as a dev machine through the night. Some people, that's just the way they are.