Ideally you want to stay aove 20 big blinds to even be a contender at all (you can still make it with less but you have to play tight) i would say confortable play is roughly 60 big blinds will allow you to play a little loser 100 or more big blinds play tight and coast your way in byonly playing stellar hands an developing a tight player image so you can donk all day at the final table if you make it lol