Your cooler tower idea is great, but I believe I have some improvements and ideas to simplify it. Put a swamp cooler, or two or three up high. The best are the ones with the duct in the.bottom and pads on all 4 sides. I mean high so you need a sturdy platform and don't put them all together, leave space for wind to blow through then they have better functionality and can withstand high winds. You don't need a motor so you can get ones others are throwing out.
10 to 20 feet above where a duct dropping straight down will enter into through a window,wall or roof. Convection is your motor. Cold air drops and as the day gets hotter cold air drops faster. As luck would have it this also pulls air through your pads. The higher the tower the better your convection motor works. You can use the regular water pump and float......or put the reservoir on top. Yes on top. With a float. And use long pads or RAG RUGS to wick water down to the pads. No pump on top necessary. Then have another reservoir either or around roofline. This would only be for catching the excess water that goes through the pads. You would have to have drai. Lines to the bottom reservoir. Or the way I do it is to just have the top reservoir and drain the excess into a water catchment for landscape plants/ garden or directly onto the plants you want watered and move the hose if desired to water multiple plants. And a 12volt solar pump can be used to keep the reservoir full. Initial setup would be cheap. Running it. 100% FREE, MAINTENANCE. MUCH LESS THAN A TRADITIONAL SWAMP COOLER WITH 2 MOTORS . BELIEVE IT OR NOT IT WORKS GREAT. THE HOTTER THE DAY, THE BETTER YOUR CONVECTION WORKS. AND wicking water from above keeps your pads evenly soaked probably better than those spaghetti hoses on top of the pads. Remember, swamp coolers are for arid areas. HIGH desert southeastern Arizona in my case. Feel free to adjust as desired. But it does work.
