I have a 31,000 gallon pool in Katy Texas and its plenty hot here. Last year the pool was typically 93-95 degrees during summer months. I ordered 2 pool misters online for like $35 each. After installation I wasn't satisfied with the flow, so I used the supplied plugs to plug 2 of the other returns. I have 7 total returns. 2 with misters, 2 plugged, and 3 flowing normally. It took about 10 days, but my pool now hovers around 82 degrees. It's very refreshing. In fact, on July 4th, the kids asked me to turn it off because they were cold....
So if you ask me, I'm not sure why anyone would spend more than $100 total. There's really no need.