I found this video on youtube, a 24 game multitabler.
It looks like about one action per second. It can't be possible to get any reads, but I guess that's why he says.
"as said before, offcourse this can be profitable, and in my case it is! But but but, I couldnt be doing this on the 27$ turbo-sngs, thats for sure! 6,5$ is my max with a profit on 24 tables at a time! Trying to advance to 15$ but still dont have a profit with more than 9-10 tables there."
It would be interesting to see how many games are optimal for hourly rate at each level.