Fiatless, you might be wrong and I assure you that their relationship is not irreparable. Any relationship that is politic is easy to repair because it is based on interest and nothing more. Trump has no problems with Elon's family and vice versa. It is just political misunderstanding and falling out. If they align again politically, everything will fall in place.
I so much knew that the relationship between Trump and Elon will not last. Those two dudes are very much ambitious and no one will agree to sacrifice for the other.
You are right KingsDen. There is a saying that "in politics, there are no permanent enemies or friends, only permanent interests". If Trump decides to allocate more grants to Elon Musk's companies, their relationship might be restored. Politicians and businessmen are concerned about money and power and they can form any alliance to achieve these.
I also suspected that their partnership would not last because two captains cannot be on a ship. The richest man in the world cannot be loyal to any president.