That is REALLY slick!
I hadn't thought about mounting one up high like that. I've got a big furnace fan from a 2-story house... it moves a hell of a lot of air... it'll blow itself across the floor. I've got it mounted on four casters to make it portable, but your idea is better.
I'd need to change the pulley diameter to slow mine down, or it'd blow itself over--even with the tripod base.
Got me thinking now!
-Brad