If a personal chef were to charge an amount to come in and teach a class in ...say...candy making to you and your friends, how much would you expect to pay per person? NOT per hour...this is per person. The class could last anywhere from 2 - 4 hours.
The personal chef would buy the ingredients and then leave anything that was left over for the people to split.
What would you pay if you wanted to take a personalized class like that?