I wouldn't pay that sort of money to see any "entertainer" whoever he was .
I went to see Harrison H. Schmitt the only geologist scientist to go to the Moon,going to Mars was all he was interested in speaking about
The only question he answered about the Moon Mission was from a young boy who really didn't want to ask the question but was forced to by his parents.
It was the proverbial, How do you go to the toilet in a space craft?
Would not take questions from adults and refused to be even photographed with anyone.
It was complete waste of petrol for me to drive nearly 300 kms round trip.
There were not very many happy faces in the audience that night.
He came across to me as a not very amicable person.

Cheers