I'd go ahead and rent out his room. He'll have arrangements with the county/state soon enough.
From what I've seen, the defense made a much better case. Since there cannot be reasonable doubt to convict, he should walk. As for what actually happened, I think two people overreacted to a situation. Martin didn't like being followed, Zimmerman didn't care what Martin liked and not so politely explained this to him, Martin forced a physical confrontation, Zimmerman shot him. The only person that knows if he felt his life was in jeopardy is Zimmerman. He's saying he did and no one has been able to prove it wasn't. If not for the testimony of that dumb Rachel Jental woman, one could suggest that Martin tried to walk away and Zimmerman made it physical but, from her testimony, Martin made no effort to walk away.