Several years ago, I was a closing speaker for a women's conference and the opening motivational speaker didn't show up. It's not that she had something better to do, but she had fallen ill.
Audiences love to laugh. If you are searching solely for someone to make people laugh at your event, you can save a lot of money by hiring a comedian. Comedians can charge anywhere from $500-$2,000 and a funny motivational speaker can charge $2,000-$10,0000.