Bankroll/ROR
Page 182 of Blackjack Bluebook II shows a chart that says for 6 decks w/common rules, 4.25/6.0 pen, a 10-to-100 spread reaching the 100 max at +3 true and 4 hours of play, you need:
1100 for a 10% daily ROR
1400 for a 5% daily ROR
1700 for a 2% daily ROR
Figures were derived from John Auston's Blackjack Risk Manager, and assumes play with a "mid-range" system such as Hi/Lo, KO, Kiss III or Red 7. There are also charts for 25 hours and 300 hours.
Fred