First of all, thanks again to everyone who replied to my thread.
Talking with my son today, apparently the wedding part only last 3 minutes ( conveyor belt system) so it is a lot of money for a 3 minutes ceremony as we would only stay 4 days. Also, I know I wouldn't feel comfortable in New York .
My son is planning a big family get together on the 17th when they are back from NY so I will definitively be there then.