this may sound like hogwash but i actually did almost 3x your goal in about 4 days on CDPoker around 5 years ago. The greatest and worst poker story of my life. Ran $25 of freeroll winnings into $6500 and then promptly gave it all back in less than 2 days. I was housesitting and there was no one around to tell me to stop. Couldn't sleep, I'd close my eyes and see cards. I was so sick I didn't play 6 months. So it's definitely more than feasible.