the problem is, you wont be able to join any leagues. The only leagues you will be in are ones with other people who have exactly the same advantage as you. Granted they may not be doing it for the same reasons as you (this happened to me last year, my first dreamteam year, i joined a week late accidently). you will just be put into a random league. All the leagues with people who signed up first are already filled by the end of round 1 lockout.
This means that the only reason to do this is to win overall. It is possible, you'd just have to have great insight from just one performance as to who may dominate this year. Harding, Mcdonald, gilbee, vince may all do well this year for a cheapish price, as their roles seem to have changed, and not many would have them. In reality you would have to average about 110 points more per round then the person who came second (to make up the 2300 you are behind). Is the knowledge from one round worth 110 points per round? probably not.