Bowen is going to retire IMO. I've read that he doesn't want to play basketball just to play basketball. Meaning he's been in San Antonio for like 6-7 years, I don't see him putting on another jersey for the vet min, when he's already gotten his championships, gotten his millions.
He is going to retire and live in San Antonio. He has said many times that S.A is his home. He wants to live there. He may come play in S.A for one more year, but I doubt. It doesn't matter though, he is going to retire a happy man.
He has his Championships, his Defensive Reputation and sucess, his career is finished and he had a good one.
At this point, even with BB being 50 he still has value to a team. A guy who knows where to be on the floor on D and does not make mistakes can get a job if he will play cheep. It is not just rep. His rep IS that he has lost a step. Teams know this. I bet he is not done.