I think of my bankroll as non-excisting, for a very simple reason; if you're a winning player, you could manage with almost nothing. I'm a former sh 5/10-player, and i played around 30k hands with a profit of ~2bb/100. I cashed out all of my money, except for $30, to prove to myself that i'm a winning player. But also for other reasons, school, friends.. and so on.

Took my $30 on the crypto-network, which i think has the worst sh-players online. They consist of british donkeys and similar hopeless players. Just fiddeling their money away. I sat down with my entire bankroll of 30 on a 1/2 sh-table.

I have now played around 15k hands at this level (without reloading), and crushing it easily. Every average good sh-player will be able to do so, if they did good on higher levels.

Some stats:
VP$IP: 26,5%
PFR: 17%
WTSD: 41%
Att. steal: 32,16%
Agg factors: flop: 2,19
turn: 2,44
river: 2,35
bb/100: 4,5.

People take shots at limits all the time, i don't see why you can't start with it.