Obviously it's not worth this amount (after living in it for a month I felt it wasn't worth this much even without the repair issues, so you can understand there are a lot of other issues I haven't noted here that make it an undesirable residence - friends and family kept asking me why the heck I was paying so much). 

Picking up rent even if it is not in cash cold very well attract undesirable attention and place you at risk.Please consider your safety.

I use a standard scoring system.Find out if your insurance coverage disallows any breeds.You may end up needing to accept an undesirable animal, then you have to hope for the best and keep them accountable to the rules, damages, and quiet enjoyment for others.

That right there is reason enough to nip this cancer in the bud and get rid of these types of undesirables.

Stay under market if you have a undesirable property otherwise why would you supplement your tenants rent.

Whether you are a Section 8 property or not, you still want to get tenants who will pay rent and not damage your property, or cook meth in it, etc.If the only people who are willing to live in a property are criminals or undesirables, then you will have problems.So, no, not any property will be a good investment.  

For us the break-in  risk, proximity to other properties and the tenants generally being high made it undesirable to have them there. 

My leases for pets make it undesired.  10% increase in rent monthly for pet rent 100% of the deposit in addition so 2 months rent deposit total for the pet.

Or is there something about your properties that makes them undesirable to good tenants who have more options?

Many companies require you to use their application forms (on-line or faxed/e-mailed), which we do and add our own supplemental pages for info they don't request but we want.Think about the qualities of a good tenant, what your criteria is, and design a process to weed out undesirables and look at credit, criminal landlord history.