Three hours - yep, that is the time frame I would be looking at too. I think I will put off the job until I have to swift through for six hours.

The elderly stand there and shout Everything is a computer now! You can't wash the piss off your hands without a computer! That light blinking up there is because of a computer, I know it. All this new, crazy computer technology...
And it probably continues for another 10 minutes.