Less than perfect timing

I met with a man yesterday who is going to pour a concrete slab for me to replace the dangerously sloping slab now under my air conditioner. What was a minor tilt last year seems to have settled another several inches over this past winter. I'm really concerned that, if I don't replace the current slab, my AC will vibrate itself across the yard when I run it. So, not knowing for sure when they will pour the slab, I called my HVAC company right away to make arrangements for them to disconnect and move the AC unit.  Here's where the bad timing comes in - after I scheduled the disconnect for tomorrow and discovered that the concrete guys can't do the work until next week, I heard on the news that the temperature this weekend may rise into the mid-80s.  I wouldn't be too concerned about that except I have an out of town guest staying this weekend.  I guess we'll just have to stay cool the old fashioned way, with open windows and fans. She'll be so excited.