Train those young players first. Forget everything else! Think about it, some seasons down the road they're either gonna be the one you're building your team around with -- in the way that's best for your team -- or players you can profit from (selling). Side by side with a training program, you slowly upgrade your arena. Few seasons later, you will (whether you like it or not), not only promote (if you haven't) a tier but be competitive enough for USA DIV.