Another factor to consider is the height and features of your home. An example would be a house completely trimmed in Cement Fiber, which does chalk if you do not purchase the correct paint and apply enough of it. Some houses in Coastal Areas are already on 15+ft Stilts (off ground) and then another 20ft high at times. This requires rental equipment and careful cost estimation based on the difficulty of the overall project, The best advice that I can give is to get several estimates in your area and make a decision a couple of weeks afterwards. You will "weed out" per se the individuals that do not have the patience to finish a project that was started-as well as those who haggle you for payment (sometimes daily) before project is completed. I have heard some wild stories from a lot of Homeowners. Common sense and your intuition will make you aware of anyone that you should not hire.
A true professional understands that it is his or her responsibility to provide a quality job for the homeowner. Professionals also know that attention to detail is a part of the job. While a homeowner might leave a bit of paint on the window pane, a dedicated interior painter for hire will make sure that these small details are handled properly, because a perfect job is the best calling card.