I am considering starting a part-time pool maintenance business in the Chicago area. It would be great to figure out the market potential. Midwest specific answers to the following questions would be ideal: 1) How many private pool owners maintain their own pools vs. hiring a professional service? 2) What percentage of pool owners that hire a service use them on a weekly basis or just for the bi-annual openings and closings? 3) How many private pool owners are dissatisfied with their current pool service company? 4) Do pool owners have difficulty finding a pool maintenance service?