The article and comments were great information to have before deciding how to go about getting a painting job done. I think the important point is that there are several key choices (who to do the work; color, sheen, quality, of paint; how many coats; amount of prep/repairs to be done and by whom, how long the job will take, provisions for changes, how detailed the contract needs to be; advanced deposit/progress payments/final payment; final inspection, etc.) that need to be made and it requires advanced research and planning in order to become well enough informed to make the right choices. Then it requires spending sufficient time to check materials and inspect the quality of the work while it is on-going, raher than waiting to do it all at the end. President Reagan's philosophy of "Trust, but verify." applies.
I wish I had found sugarhouse painting when I moved in rather than now as I'm moving out. They've made my home look fresh, clean and gave it to the facelift it needed. I liked how they arrived when they said they would and the estimates that gave for both the time it would take to finish the job and the price for completing the job were honest, timely and fare. You can tell that they pride themselves in their work and I would use them again without question.
Depending on just how dirty the outside of your house is and on the house's size, there are two ways to approach this job. If you live in an average-size house, use a garden hose with a carwash brush attachment to bathe the big areas. For caked-on dirt, use a scrub brush or a sponge and a pail of warm water with a good, strong household detergent in it. Work from the top down, and rinse all areas where you scrubbed with water.