The others will be simplified with less detail and a smaller price. Feel free to surf around on the Internet for other mural artists. I charge by how long it will take and how much paint I need. I use car paint in my airbrush. This may sound a little strange, but I have tried every kind of airbrush paint on the market.
Car paint is the cheapest and works best.
I can get a finer spray for smooth gradients. Cleanup is easier with oil based paints too. Car paint will stick to any surface and is made to withstand sun, weather, and anything you can throw at it. It will last as long as your house. For an additional charge, I can even gloss coat it.