Rebuy Question

[Nikita]

Ok, I'm thinking of trying the $3.30 rebuy tourney on stars. But, I want to make sure my new bankroll can actually handle it. I've seen posts on bankroll size for normal tourneys, but what should your bankroll be for a rebuy? I know I should expect to make one rebuy and an add on, so I'm guessing I should consider the buy-in to be at least $9. Is this what I use to calculate what size of bankroll I should have? Or do I also add in a few more rebuys? If so how many?