What is a good ROI playing HU sit and go.

[Yahve]

Hi all,

I was actually wondering what should be a good ROI playing HU sngs. I started playing HU 10+1 at stars and im doing good so far. I know that a good ROI on a 1 table sngs should be around 20-30%, is it different if its HU tourney. I think it should be lower since when you win, you only earn 1 buyin. Also, what should be a proper bankroll? 20-30 buyin like in a normal 1-table sngs?

Thank you in advance for your answers.

Yahve