There was never a warranty deed with vendor's lien or anything of that nature recorded. 

Dealing with the county or courts makes me want to jump off a bridge, and just knowing human nature, I dont feel like dealing with heirs to anything. 

She actually did you a huge favor by revealing her true nature this early in the lease (which is great news).This is what I call a cheap lesson.

Lastly, remember that Regular upkeep is the nature of the beast with rental properties. 

Or DIY, you can use "Natures miracle" spray which is sold at retail stores which is an enzyme based cleaner that works great on urine and will break down the ammonia (and strong associated urine smell) in urine that makes it pungent.

One thing you might want to think about, though, is that clustered fourplexes are almost by definition in rough areas, simply by the nature of what they are.

My point is rentals are tough things to run through calculators  they can be a baseline but reality of owning them will be different better  or in most cases worse  since its human nature to pick the most aggressive scenarios.. 

Assuming they are otherwise a decent tenant and not tearing up the place and are staying long-term, and considering re-renting costs, vacancies, unknown nature of the next section 8 tenant, etc, do many of you hands-on Section 8 landlords with tenants having rent 95% paid just opt to do nothing and let it ride?

Yes, this is natural real estate prices do not run in a linear line up.  

Here’s a recent article.With prices rising “naturally” as fast as they’ve been these past years, I’m surprised this tactic has been necessary.