You know your chins are spoiled when they have their own AC and heater. When I lived in Baton Rouge, I had no central heat or AC, so I feel you pain. Their room was a perfect 72 in summer and so was my bedroom. It was nice in that all the rooms had doors that shut, so those two rooms were cool and the rest of the place soared into the 90s.
I am also glad that I am missing the summer in Fayetteville. We had noproblem keeping the house on Audrey Ct. at around 71, but then we had a new central air unit.
Currently, the chins are in a workroom with separate temp control than everyone else, so I can keep our house at 78 and their room at 71. I have to make special trips to see them, but it isn't hard to do that.
As for those of you who can't get AC, my friend in WI did it for several years. It can get super hot in WI, but it cools down at night. With some TLC, lots of water, and a cooler nights, her chins did pretty well.