I think BarrettaM59, having DS not get scholarship or enough FA at SMCs of choice is evaluating the scholarship prospects going forward, which is an exercise many here have undertaken.
From the description of the unit (sounds roughly similar to goaliegirl's), the numbers (Frosh through Senior) sounds reasonable as there are a lot of walk-ons who try it and get discouraged and leave the program. A couple might have academic issues along the way or just don't do well enough to merit the PMS' recommendation for advanced standing. Of the upperclassmen a couple might be 4-year winners, a few more may have campus scholarships awarded along the way or may be National Guard. And there will be a few upperclassmen who are only getting the stipend (no scholarship).
I think the best thing to do to find out the lay of the land is to have the prospective cadet talk to the ROO and ask about the last couple of years and who may have picked up scholarships (and/or advanced standing) to ask what made them stand out to merit that (i.e. GPA, participation within unit, PFT scores, athletics, etc.).
Understand that the competition is different every year and STUFF happens along the way, so aiming quite a bit higher is always better. This may serve as a wake-up call to the prospective cadet of the realities of life in the military - nothing is guaranteed, work you hardest and then do more yet, and good things will happen to those who persevere.