i would have thrown him out on the first missed payment. you are too nice.
btw..i hope you made him sign a contract etc..before moving in. my bro has roommates and the contracts says if the rent isn't there by the 1st then he has the right to remove all the stuff from teh room and vacate it.
edit: and rent is 500 a month so thats not chump change either :eek3: