He took 2 1/2 minutes on the first window i would have had at least have a dozen of them done by then.
He's not very fast with the backflip on a pole either maybe a bit more practice is needed he could do it quite a bit quicker with perfect results both methods.
Mind you if he does all his windows like the first one he one be getting any complaints as they would be perfect.
But he would not earn a great deal of money