Good for him (assuming his parents actually wanted a Rolls-Royce). He can certainly afford it. I do hope he is setting aside sufficient funds to take care of him and his family once he is finished playing basketball.
I dunno about that.
Of course, I've no idea about his salary, or his financial situation. But I know that a basketball career is measured in a few years, not decades, so he has a short earning horizon. And, he's one ACL injury away from "That guy over in the corner? Yeah, I think he played ball awhile back."
His money, he can do what he likes. However, the old saw about a fool and his money always rings true.