Let 'Em Ride online bankroll

The RTG jackpot at Lock casino is up to 170k, I read at http://www.optimalgambling.com/letitride/best-let-it-ride-poker.htm that the progressive jackpot has to reach 217k to make the game+ev. If I play $1 bets w/ $1 side bet what is a good minimum bankroll to start off with?

Also, any idea on how to calculate how many plays ~ will I get with a 1k br. I know there is a way to calculate it but am unsure.


Thanks