Swamp cooler to refrigerated air is the search nobody has answered well
Evaporative cooling is a real option along the Front Range, and the decision to leave it behind is a search with almost no honest local content behind it.
Houses across Lakewood, Arvada and Wheat Ridge still cool with a swamp cooler on the roof. Every spring somebody searches how to start one up. Every August somebody searches whether to give up and put in refrigerated air. A page written for a Gulf coast market will never mention either one.
Write the comparison the way you would explain it standing in a driveway. What the conversion actually involves. Whether the existing ductwork can carry cooling. What happens to the roof opening. What the electrical service has to support. Give ranges you can stand behind and say where your numbers come from.
Seasonal start-up and shutdown guides pull traffic in the two months when nobody is buying equipment, which is fine. The homeowner reading a shutdown guide in October is the same homeowner calling in July, and by then your name is already familiar.
Some of that traffic is pure do-it-yourself. Pads, a float valve, a belt. Keep those pages, keep them short, and end each with one honest line about when the job is worth a service call.