Can big bankroll exploit casinos?

[Markie1]

Really, if you had a 10k (or 5, or 2 or 20, whatever) roulette bankroll and wanted to make 20 bucks per day, you should earn 500 to 600 dollars per month, which is the average paycheck from where I come from. Even if it's not enough for you, I don't think anyone would mind having the extra five hundies monthly. You could bet one color, 20$ on one spin if you're lazy enough, or if not, start with $1 or even 50 cents if possible and work your way up. But really, based on 10.000 dollars bankroll, 20 bucks is 0,2%. So really, I know anything is possible, but I don't see how it could fail, other than maybe if you go silly on Martingale or something. It would be good to limit your 10k's to a smaller amount, and have them in reserve just as mental advantage. What do you think?