You screwed yourself good, if you play this by the law then he could be still there in a year, and you will only be out of pocket. If I was losing money already I would not be spending more on lawyers to dance around red tape. Is he the type of person to go get a lawyer if you start cutting off electric (I don't even think you can do this legally so be careful if you want to stay the bright side of the law).
If however you move to the dark side and want him out quick, then
[video=youtube;QmKju-x8nnM]http://www.youtube.com/watch?v=QmKju-x8nnM[/video]
he will understand this better than any legal action, and probably act on it much quicker.
Most people will not agree with me, but why should he get a years free rent from you. When in DR act like a Dom, get physical or ask your local PN friend to have a quiet word and pay your tax directly.