Can also hint that I might consider adverse possession with the white fence likely being 20+ years old as grounds for him working with me the preferred way.

Roman is correct, except the tax certificate/deed route doesn’t give you possession....it just sends it to public auction where you have to bid against everyone else.

RIGHT OF TERMINATION AND RE-ENTRY:In the event of any breach of payment of rent or any other allowed charge, or other breach to this lease, Landlord shall have full right to terminate this Lease in accordance with state law and re-enter and re-claim possession of the leased premises, in addition to such other remedies available to Landlord arising from said breach.I already reached out to her and told her she needs to get the pets out of the property of which she replied that it was for a friend who was out of town for the weekend and the pet will be gone today.What can i do if i find out there are still pets in the property.   

These tenants have possession of the house, therefore any damage to it is their responsibility.

Some one would win the auction and get possession. 

I could have had personal stuff over there or a new tenant could have taken possession and I would have been in trouble.  

The tenant currently has possession of the property and a lease.

But there is a 99 year lease in place.In order for the fee owner to obtain possession of the property they would need to pursue that via the courts, including notifying interested parties (such as mortgagees) of the action.

But I am back and ready to take another crack at things now that I possess some knowledge from reading books and listening to podcasts.

I bought a flip a while back and was able to talk to the town inspector to give the CO despite some issues (water damage, cracked windows, etc) because he knew I was going to fix them all when I took possession.