Why cant you bet small with a 3x rollover. Remember that you dont HAVE to take a payout once the rollover is complete. There is no rush to be honest. Spread it out over a months worth of action and you will turn it into $7000 or so.
I turned contest winnings of only $150 into $1250 3 weeks ago, just ask bcbets! Oh yes, and I left $400 in my account for good measure, but have lost about $300 of that. So I went from $150 to $1650 in only 4 days worth of action. Of course that was betting strickly parlays so that is why I got so much money