This is great news. Good that he thinks that all the jobs he can get with just the HS degree suck! Good that you pointed out this is what college is for, not for the party.
If and when he restarts college, make it a condition of his return that you have total and complete access to everything: FERPA for health, academics, permission to speak with all docs and dean, absolutely everything, and follow along with his progress daily at first, then weekly through that first term back in school, and maybe until he has his degree. Also, have serious discussions with him about major, career, object being work he will enjoy that will support him and a family, not just a 4 yr party.