You don't need a 20K+ monster, especially not a PG, SG or even SF. All of which can be bought at a young age (20-25) a LOT cheaper than 900K-1 Mil. You don't need a LeBron James type player to make it out of D.V. You just need a supporting cast strong enough to run a good offense and defense. Also Gameshape/Enthusiasm management is critical.
I promoted out of D.V against better and higher salaried teams. My most expensive player was a 12K SF... I made it because of a great offense/okay defense, good Gameshape and high Enthusiasm.