Chris has similar rules...

For his freelance work (only his rates are about three times that):

As told by an old school film editor, from the days when they actually handled film:
Client: ”What is your rate?”
Me: ”$50 per hour.”
Client: ”Can I come watch you?”
Me: ”Sure, for $100/hour.”
Client: ”What if I help you?”
Me: ”That would be $400 per hour.”

From Clients From Hell