I have a pool that I don't use. We got it because my wife does not like to swim at the gym and only she uses it. Heat it up for the weekend, at what was about $8 a degree, and about $5/hour to keep it there. With opening, closing and cleaning, I think that last year, we were spending about $600/weekend so that the wife could swim for 2 hours. I am not sure if I will even bother opening the pool this year. Maybe just when company comes over.