If its Possible,as far as it depends on you,live at peace with everyone;Romans 12:18(NIV)
Be very afraid to hire goons or can i say those who do not think twice b4 shedding someone's blood.Its not worth it for rent delay.I know its not really good when one is joking around with your sweat(Investment) but you can vacate the tenant in a better way.Am sick and tired of hearing bad news of young girls being kidnaped,raped or even killed.I believe that most of them a resulting from some witches who are in revange mission.My heart goes for the innocent kids who have to pay for such sins with their lives.
Believe me or not,you dont need to create more enemies than the ones you already have in this life .
If i was in ur shoes,i would give him a notice stating that by the end of March 2011, i will be renovating my hse.During that time,i wld not allow him to read my mind.I wld behave in a very friendly manner that will leave no room to doubt then give him a peaceful send off(Hint.thats how i deal with my Hse helps since i dont know what they are capable of doing while am away or even at night when am asleep).
On ur case the tenant can secrately remove his valuables and set ur hse on fire in the name of accident.Dont trust Him,he is a human being my friend.Thats the other side of the coin.
If he is wise enough,end of much is such a long time to get a nother place,you can also assist him with the such just to get rid of Him since you dont trust him anymore
On the other hand,u cld have given him an audience ,let him tell you the reason for his delays and reschedule ur deadline appropriately upon which u introduce penaltiesi case of any delay.Am saying this coz u never know ur next tenant.I was told about some wired pple who lives in the City without paying rent.The guy gets into ur house with very little items,stays for 3months without paying,when u kick him out,he moves to a new estate and the story continues.
Wish u all the best