Errol said on the radio show that he wasn't proud of his son alone.
Errol said the family had done a lot of things.
Errol said Kimbal was his pride and joy.
The whole Musk family has done a lot of things for a long time, so my dad isn't proud of him alone.
In a wide-ranging 20-minute interview on Australia's "The Kyle and Jackie O Show," Errol Musk spoke about Elon and the rest of the Musk family.
Errol said that they were a family that had been doing things for a long time. We didn't suddenly start doing something.
Musk told the radio show that his children had traveled around the world with him since they were small.
He said that they have done a lot of things together. "Elan has really exceeded the mark."
The elder Musk said that his son was not as happy as he would like to be because he felt like he was behind schedule.
Errol Musk said that he would have liked to have been there a long time ago.
He said his son was a big fan of the space company.
Musk said that the man was frustrated with progress.
In the interview, Musk said Kimbal was his pride and joy.
According to Musk, Kimbal was also a billionaire, though he wasn't as rich as Elon.
Forbes put Kimbal Musk's net worth at $700 million, but it's not clear if he is a billionaire.
Errol said that Kimbal was lucky in his marriage because he spent a lot of time with his wife.
He was worried that he wouldn't be able to find a partner who would give up a career for him.
Errol said that finding a woman to give up what she's doing is difficult.
Twice to Talulah Riley and once to Justine Wilson, Musk's first and second wives. He's been romantically involved with a number of celebrities.
The Wall Street Journal reported last month that he had a brief affair with the wife of Sergey Brin.
Business Insider has an article on it.