lolz..
6 mnths is too much ady..
my dad also hav a house for rent.. n every mnth if a tenant din pay we will warn him..
but if he delay rental for a mnth (cos our deposit is for 1 mnth) we will definitely halau him..
if he din leave the 2nd day sure my dad n some friends will take cangkul n halau..
although it seems a bit barbaric but tat's the way to handle such ppl..
but it's better to do it nicely... try report police.. since he no longer pay rent so he can be charged for trespassin like meejawa said..