One thing to look at it is what other owners in your league have done. If no one has $20M for college for example, then if you were to have $20M for college, you'd have an advantage in the draft.
In my league, I'm the only owner with $20M for college. Last season, drafting in the 20s, got a 20-yo SP who was good enough that I made him my #5 SP this season. He's held his own.