I don’t know your parent’s health or age but these are great things to inherit.

Every rental unit should have a bathtub combination tub and shower, or a bathtub and a separate shower, or you automatically eliminate the number of potential renters who want or need a bathtub for personal preference or for health reasons.

There really is no free lunch.Startup founders face a similar dilemma when they're growing. 

My wife and I also faced the sell/keep as a rental dilemma our property recently.

Make sure there is a clause in your lease that states the owner/manager has the right to enter at any time there is a health/safety emergency, so you can document, diagnose, and repair the emergency. 

Might even help to keep the day job so you have that nice 1099 income coming in and maybe some benefits like health insurance. 

(I was going to say or the property was sold at its real value and that money was spent for health care.

The father in law sounds like he has some mental health issues and is a busy body going around making up problems...his daughter told me he is a really handy guy and can help fix things around the house if I like and I told them no.

One of my investments is a 3 story house with an apartment on each floor. A vacancy opened up on the first floor and the tenant on the third floor is moving in there. She's my favorite tenant, clean, pays on time ever...

In my area, the environmental health department deals with sewage issues and they will inspect it and issue a red tag.