He and his wife have recently moved 7 hours away for his wifes health/ allergy reasons and do not want to manage the property long distance. 

The lady in the other half had health problems.

Well water in good Standings with the local Health Department and a septic system that appears to be in working condition.

I was wondering how many condo investors measure HOA health?

Cats are a serious Health risk Wash your hands when around them. 

Did you have any idea she had bunnies in the property as pets at any time before this dilemma ?

I have a dilemma where my current property manager may retire in ~5years.

I would make sure you get all the documentation from the town that it was certified with a good bill of health.

This is Allegheny County, If you know the county court and county property records-keeping systems, you can crawl so far up into people's private business using the online records system that you're ashamed of how much you know about them.Our tenants also typically come from the health-care industry, our area's largest employer.

Unfortunately, his father’s health deteriorated and instead moved into an assisted living facility.