SASless
You aren't kidding! The issues you cite make timing car rentals challenging. A copter is a much more elegant solution.
Cyclic Hotline
I've sent them an email and expect them to get back to me by tomorrow. I thank you for the reference, I probably wouldn't have found them on my own in time. I'm liking this site so far but having to wait for my posts to show up really sucks (still under moderation).