I agree with Jeff below, these prices are far below what I see on the market in the Portland Or. area. When one uses the term "paint the house" what exactly does one mean? Any fool can buy an airless paint sprayer and put paint on a house. New homes built with fiber cement siding paint clean and easily but older homes built with wood require much prep work.
Historically, the painter was responsible for the mixing of the paint; keeping a ready supply of pigments, oils, thinners and driers. The painter would use his experience to determine a suitable mixture depending on the nature of the job. In modern times, the painter is primarily responsible for preparation of the surface to be painted, such as patching holes in drywall, using masking tape and other protection on surfaces not to be painted, applying the paint and then cleaning up.[2]