I won't get into the specific math here cause its nerdy and not necessary, but I spent some time 'fitting a curve' to our data and here is what I came up with: Here's what is going on in this graph: The labels on the X-axis are the median rent for a given city (I am purposely omitting the city names here). 

The fire was in the attic, so it caused damage to the roof, HVAC, electrical, etc.A few weeks after the fire, we received an invoice from Fire Recovery USA for about $3,500 on behalf of the fire department for the services rendered to put out the fire.

So does altering the property in such a way that it wouldn't be eligible for new FHA financing in the future cause a problem? 

Avoid paying dearly for damage and missing rent caused by the tenants from hell by following the steps above.

The reason I am posting this is because I want to know what mistakes most realtors make that causes them to be unsuccessful?

You may charge for damages caused by the animal, but since it is not a 'pet', a pet addendum doesn't apply.

It takes the IRS a long time to catch up with people sometimes but when they do, it likely would cause a vacancy.The main question here is do you have an established criteria for vetting tenants and if so, does she meet the requirements?

I'm actually more worried right now about the 2453 just cause bill eliminating term leases.   

However it doesn't mean it's a loss cause.

What occurred causing you to lose it back to bank?