My pool is slightly larger than medium, about 2 meters deep at the deep end. In conversation with the previous owner, who had the house built, he estimated the construction cost at around 1 million. When I bought the place a year ago, I had both pumps (main and jacuzzi), clorinator, all pump house electronics, sand filter, pool lights and all pump house valves and piping replaced with brand new as the original equipment was 12 years old and tired. Cost was 185,000, installed with 5 year warranty. Maintenance cost is 2000 per month, includes all labor and materials (salt, acid, etc). Poolman comes twice a week. I have over 3 years experience with this pool (this pool for one year and the identical one across the street for over 2 years) and have proven that running the pump 4 hours per day (2 hours in the morning and 2 hours in the evening) is more than sufficient to ensure the clorinator converts enough salt to chlorine to prevent the pool from greening up. I've tracked my electrical usage meticulously, my pool uses about 10 units of electricity per day, which costs around 1400 baht per month.