Random Bankroll Question from Micro Stakes Player

[Beeasywitme]

Hi, Kinda new to this site. Sorry if this is a stupid question. Anyway, I play dime-quarter, full table cash game, generally 7 to 10 tables per session. Roughly 3500 5500 hands per day. The bankroll is always between $500 and $1000 When reaching $1000, cashing out down to $600 and beginning my quest for $1000 all over. My question is.. in order to play Quarter-Fifty cent.. how big should your bankroll be. Is it relative to # of Buy ins, or number of Big Blinds? I have heard both. Im tired of hearing about Jesus Fergusons rule of thumb and would like to know anyones rules for Bankroll management! All comments greatly appreciated! Thanks.