I really don't want to install a fence it is going to destroy the property look and it is on a corner.Any ideas are very welcome.

As long as we can encourage non-conforming tenants to move on without them turning on us, and without them destroying our property or digging in their heels or costing us more money, then it's a win.

The occupants might have destroyed the inside of the property, or might destroy it after you buy it, before they leave.

Use a 2x4 on the door side as to not damage the door. you will destroy the jamb, but that is overall a less costly fix than a window.

When a tax lien certificate is lost or destroyed, the holder of the tax lien certificate may file a notarized affidavit with the tax collecting official attesting to the loss of the certificate.

There is a room in the very back that is about 6 inches lower than that room so if it was flooding that back room would have been destroyed.

They become this fiend, this villain that could destroy you and is probably the hardest phase of all the phases.It is during the MOVING PHASE, that you must be cool, have all your wits about you and be prepared, yet still be cordial so as not to enraged the monster that seems to be lurking in your Tenant during the MOVING PHASE (as there is NO ANTIDOTE to calm the savage beast once it takes form).

I figure that the tenant will destroy it, and I will end up replacing it at some point.

The house would probably also be destroyed before possession was turned over and the father doesn't sound like the person I would want to trust in through a long process without getting a claim against me once I got the other part resolved. 

Even for non payment of rent it can take 3-6 months or more to evict and professional tenants can and have lived rent free in Ontario for more than a year while also destroying the properties.