Secondly I have been advised by my Dr to be tested for mold, parasitic, allergic or breathing problems.

If approach vendors from a 1-sided mindset of looking to squeeze as much out of them for the absolute minimum $ possible, that is called a parasitic relationship, and your only going to get parasites of vendors working with you in any duration. 

A landlord operating at net loss is NOT fair, it's parasitic.   

I'm all about capitalism, but I don't understand how these parasites sleep at night. 

Given, That Im allergeric to Cats. or that the Center for Diease Control claims 40 million Americas are now infected with the parasite Toxoplosmosis Goni from Cat Feces.

Change the locks so this parasite can’t come back .

I'm not risking bringing someone else's parasites, pet dander (or worse), odors, or bodily fluids into my nice vacation rental.

It's obvious you only see them as objects of contempt, parasites on the a** of humanity.

It is best not to get in the way of parasites and their herders The best thing to do is not allow them to prey on you.

These effing parasites really know how to work the system.