@Chris Seveney for context this would be a primary residence and house hack, so it's a little less cut and dry vs. other investment purchases I've made previously but I hear you on your analogy and POV.

De Humidifiers are more efficient for humidity and also help with the temperature "fee".  60 moist is a lot colder than 60 dry.  88 dry is a lot cooler than 88 moist.S.

Here having a dry hill to sell during really wet times is about the only way to know you'll get somewhat of a premium.

My advise, the same I gave to the OP, do a wholesale deal dry run.

If you are in a dry climate where temperatures only reach the '80s in the summer and cool off at night, then window units are only occasionally needed and sufficient.

It is not nearly as cut and dry as if it were in your name and it may not be worth his time and effort to deal with it.

Evaporative coolers function by sucking the hot dry air through filter pads of aspen or plastic mesh that are saturated with water that circulates via a pump in the cooler sump.They need twice yearly maintenance to even achieve their 5-10 year lifespan. 

Get the water out, dry it out and see if it'll run.

After a while, seeing the number of good deals dry up over the years left me disheartened but eventually I got the swing of things and took off.

HI - I'm considering buying a small condo in Manhattan but the window is facing multiple unidentified vents, seller told me it's all AC vents from 1 restaurant and 1 dry cleaner business on the ground floor.