With a few days' luck or strategic insight, you can certainly make a $30 profit daily with your start-up capital. But that's not guaranteed. In reality, the vast majority of day traders are losing money. Just think about it. If they all made a profit, where would the money come from?
Market trading is a zero-sum game. That means winning traders will profit only at the expense of other traders who are at a loss.
Any trading on long positions should be done within a clearly defined trading strategy.