"There is nothing wrong with that, but it seems bit stupid".Sure.
But I dont think he's old fashioned, just kid who is in love. There is nothing wrong with that, but it seems bit stupid because at that age you no where near mature to be in marriage. But he has a lot of money, so that will help.
Just a thought.
So there's something wrong with that?
Each to their own mate. I got married at 22 and best decision I've ever made.