Is the father's money considered unlawful if he earns from another job with money that is questionable, given that the mother is an astrologer and earns her living from that, and what is the advice for that?

A father selling what he owns for ten times its value is permissible, as long as it does not involve deception or fraud. There is no specific profit margin determined by Islamic law; rather, it is subject to supply and demand. As for a woman working in astrology, it is not permissible, and its prohibition must be explained to her.