Ours was just over £10k 7 years ago in a nice hotel with 80 day guests and a further 40 to the eve, then 5 nights in New York for the honeymoon.
We thought that was pretty good going as we had everything we wanted for the day, just took some shopping about with all the extras.
It's the most brilliant day of your life without doubt, would love to have the day again with my wife