Clearly, you have proven that I must be right in that this landlord got burned at some point and is now reacting with a new tenant for an old one’s mistake.

The people that base investments only off the numbers typically get burned.

I burn oil at home but still prefer propane in my rentals.

Has a list of people waiting to rent there and is getting $675 per unit. 2 years ago one of the tenants left the gas stove on with food cooking and it burned down the 3rd unit, due to insurance reasons he had to remove the building pad as well after demo.

When  I worked as a licensed electrical contractor on more than one occasion I was called out by a first time flipper who almost succeeded in burning their whole structure down, and only  by chance did not succeed in getting someone killed. 

It's not that it's burning a hole in my pocket or that I want to just blow it all in a crazy shopping spree.

Bob Burns

If "deadly fire" means that your collateral was destroyed, then your last recourse could be to a vacant piece of land or a property with a burned out shell on top of it.

You can't also form a pattern of acceptance of this will burn you right out of business.Third, if you want to make this work, you have to solve the problem. 

Urine exposure can actually "burn" the dyes in grout, it was obvious she let the urine sit there for awhile.