Our swamp cooler brings the heat... Literally. Yesterday it got up to 88 in the kitchen and 91 in our bedroom. Right now with a stand alone (small) a/c unit in the kitchen it is 85, and 87 in the bedroom. Way too hot.
I've tried all the swamp cooler tricks.... New pump, motor, filters, windows open proper amount.... Nothing helps.
I'm sure a lot has to do with the windows and insulation in our house (built in '93), and we are east facing with no shade in the backyard... The sun really radiates the back of the house in the afternoon.
After dealing with the swampy for 5yrs, I would glady pay the hefty power bill for a/c.
I think it would be neat to have both, or some type of hybrid unit. Even have a smart thermostat that monitors humidity as well and adjusts a/c and evaporative cooling accordingly.