Also a huge fan of Kanye's old works. Honestly, I don't think he's suffering from any illnesses (well, to be fair, that's probably for a qualified psychiatrist to diagnose). I think he's just a smart guy staying relevant in the media and adding to his fortune in the process. He is managing to be relevant even without his music.
Kanye was never as wealthy until he start acting nuts, dating Kim, causing political stirs, and working in fashion. I don't recall him ever achieving this level of success when he was an old school backpack rapper.
My thinking is he just realized he had to do other stuff to stay relevant given how music sales have declined over the years.