I think a lot kids need to look at the big picture. Most are far more likely to make more money following a coaching career than a career as a player.
A kid like Sampson, with his great personality, could make a few hundred thousand a year as an assistant in 3-4 years, with the possibility of making much more as a head coach. He has connections to the best prep school in the country and also to St. Vincents-St. Marys. From a recruiting perspecitve alone that is huge. Every good staff needs a younger, energetic guy to be the liason between the head coach and players. Not likely without a degree.
People just assume that you can make a killing in Europe if miss the NBA..it's really not always the case. Nearly all foreign leagues restrict the # of Americans that can play on the team. The most oversaturated position in Europe is the combo forward. The whole roster seems to be 6'6 to 6'10 with the ability to shoot from all over the court and skill to dribble....skills Sampson doesn't have yet.
I think he'll be in the NBDL making about 30-40k. I don't think the NBA would have been an option even if he stayed all four years, but he could have built up enough of a resume and imroved enough to play top level European ball or at least the next level. I see a guy like CJ Fair having a huge advantage over him down the line overseas.