Preferably 500k. Be aware that 10% of 300k is a measly 30k/year, almost a cab driver salary. Most active traders lose. Few get a consistent 20%/year.
you can find acrary's old post where he states that an average daytrader with under 200K account should be able to pull 200%/year.
I guess it depends if you have money to support yourself (and familly!) on the side. Also, you start from scratch or you already know how to trade.
i always thought that position traders don't make as much ROI as daytraders. your 200% in a few days, how sustainable is it? could it be +200% this week and -195% the next week? my guess is that for a position trader 50%/year would be a good benchmark. just like 200%/year is for a day trader.