Im in a similar situation with a municipality, but if you are able to cover health insurance through the service, that makes the transition out of the traditional W-2 much more feasible and also covers all of your bases.  

Put yourself out there and be more social...be human.

As we all know, realtors are human.

She has been transferred to a new living situation due to health reasons and can no longer pay both her mortgage and the monthly rent at the new place.

Partner with people who have the same passions for providing great housing, helping fellow humans, and building a full and abundant life.

Might be tougher to blame them for watching this if it got stopped up with leaves that were not their fault.Now if they stuffed a rag in the drain (in the lease or not) I would think they would be negligent and be responsible for this repair.Might be best to make this as idiot proof as humanly possible to prevent or minimize issues with this.Maybe also setup an inspection in the fall after leaves have fallen to check this specifically along with rest of property.

There are also First time buyer programs in many cities and being in the Health Care industry may have options available sometimes as well.  

If you have a clean bill of health aka a title policy that says the taxes were paid, you can file a claim with the title company. 

Due to the our health care system unpaId medical bIlls are not unusual.Perhaps the property could be marketed more aggressively to attract more renters?

Is there a way to ask them to leave that is humane and ethical?