Don't move to Memphis.
I have been to some awfully hot places on this planet and this summer in Memphis is ranked right up with the hottest. Our heat index hit 130 the other day. That kind of heat is just hard to fathom. How do you even contemplate doing anything outside in that kind of heat? I remember training for football season this time of year when I was in junior high - I would call child protective services on someone who wanted to make kids train outside in this weather. We got ourselves a miserable heat wave and who knows when it's going to end?
However, about this time last year (middle of July, actually), our AC broke. And it was down for several days. We had to replace the entire unit, inside and out. It took time to get everthing installed and there were complications after that. Although them temps were 20 degrees cooler last summer, those few days made things plenty miserable.
So, even though my AC struggles to keep my house in the low 80s during the peak heat of the day, it's a blessing to have it. But my next house will have two units :)