But as sort of said above; the less experienced you are, the lower the amount of your starting capital should be. Did my first trade myself in the spring of 2013 with 15 euros / 0,58BTC and lost 90% within hours because I was a complete rookie. Also, 'slow' trading (on a weekly or monthly base instead of daily) probably results in more profits / less losses and is less stressfull at the same time!
It's up to the person, one can find $10 a day enough, another person can think $1,000 is not enough per day. This is also about the capital you hold on your pocket before starting to the trade.