If you don't like KJ's math you won't like mine. I'm pissed if I break even for the day. I'm used to booking a mid 3 figure win everyday. But what I do is much different than what KJ does. I never have cared for the thin edge stuff like blackjack. I like the big edges. If you do it like I do it then its payday everyday. There are just no real downswings.
I'd put my average edge at around 15%. That sounds like a lot and it would be if I could run say 10K a day in wager. But that's not how it works. In order to keep the edge up I have to be very picky about the plays I put down. That means I might get in a 2K to 4K wager a day. And even then I don't win on every play. But when I put down 15 to 30 plays a day the minority of plays I lose on are well covered by the majority of plays that are winners.
And actually this is all in the past because I'm pretty much retired now. Not by choice but by health. But that's how it was when I was doing it.