Coolgran,
We all think we can judge character which we do by past behavior but we cannot predict the future, couples in particular are impossible. In my extended family there have been several divorces of couples that we thought were a good match, conversely others have stayed together when nobody thought it would last.
A lot of us Grand parents have cash to spare ( I don't) giving or loaning money to a young couple can unbalance their relationship, giving cash to a daughter might make a man feel inferior, there is no easy option.
The human touch…….flight booking.

90% and
only 10% of the time.