My father in law bought a paiting company, I am going to be in charge of consulting, setting dates, all that kind of stuff. Questions: What is the average cost per square foot for paiting walls, ceilings, etc. Does it make a difference in the price whether it is interior or exterior painting? How does the price rance from cheap paint to expensive more quality paint? How much more for each extra coat of painting? Someone answer please. My father in law knows a lot but he's spanish and I got to put this out in english and get customers for him! *** email deleted to comply with site rules**