You need to take him to court.

You cannot change the locks or move his stuff out. You can ask for unpaid rent as well as attorney fees. This is a society governed by laws. You did not follow the proper procedure when renting out your house, so you can only blame yourself. You did not conduct a credit check, signed no paper to document the lease. This time around, you need to follow the proper procedure. You cannot move him out without his agreement or a court order.

Forget selling the house at the moment, you need to deal with him first.

I would suggest that you go to your house and let me know that you will sue him and see if he agrees to move out in a one week. If not, sue him for unpaid rent, damage to the house, cleaning fees and attorney fees.

What can I say? "Never trust the Indians"