We did an awful lot of calculatin for our older son in particular out of HS and but for a select handful, the economics of the decision doesn't work out all that often in favor of the player to go pro at that point.
Oh - you know your son will go back to school? Sure, but he would be the exception according to most numbers I've seen. Odds are far greater in his favor for finishing school if he gets 3/4 of it done in the 3 years after HS.
if you actually stick around for 4 years and graduate - 4th year probably cut to 25% so another $7.5K out of pocket.
Where did you get that idea from? I'm sure it happens but I can tell you in both of our sons cases it absolutely did not. in fact I will tell you that I know quite a few players who were offered (and some took) a raise to come back for senior year all the way up to 100%. Let's be careful here not to throw things out like this off the tops of our heads. Too often, they are incorrect and mislead.