Appropriate bankroll for casino blackjack?

I’m not an advantage player, but have memorized and practiced basic strategy. Assuming I bet the $25 table minimum, is $700 likely enough to play for 4-5 hours total at a busy table? Of course I’d never bring more than I’m willing to lose regardless, but I’ve seen people recommend as much as 250x your average bet as a bankroll, so wondering what general thoughts are on this