I would take about $600 for your play at 1/2 live. If you play a tight aggressive style I believe you will do fine. People call way to light at the casinos
. Of course, it is plausible that you lose that money while putting your money in good from normal variation.
It is hard when you are first trying to build a bankroll. If you follow all the rules of bankroll management it could take you a while before you ever sit at the table. I take shots at higher limits and if I lose drop down to lower stakes and try to figure out how I am being exploited.