Sounds easy until you realize that 3% gain is quite a bit of gain. Besides my accidental huge gain, I haven't been able to make more than 1% a day.
In 200 days (40 weeks) that means you'll have to be on top of every stock you buy, paying close attention to it. I think if you spread the goal out over a year it might be doable. Because if you force yourself to buy and sell every singe day you will pressure yourself into making a bad decision.
Then the tough question comes. Do you bail? Do you hang?
Even if it rises, when do you sell? Do you hang onto it til it does make 3%?