I’m gonna be honest, I’m not asking for a friend, I’m asking for myself. Our daughter (24) married this man (65) in September. She herself stated money was the main reason, and he knows it but it doesn’t bother him. Both my husband & I are having a very hard time getting used to the idea.
Do you trust your daughter judgment? If so, trust her even when you may disagree.
If she is happy with the guy (reading your other comments, that seems to be the case) and since this mariage will give her the means to do all she wants and not worry too much. Imho, wishing them both the best seems the best thing to do :)