I guess the main reasons I’d want to keep the house are 1) ego - to be able to say “I own a rental property” and 2) hope for things to magically turn around and one day sell for profit (gambling...)What would you do in my shoes?

Go into the property with a flat rubber soled shoe and scrape your foot across the floor like you're trying to dig a hole in the floor with your foot.

Counterfeit.  

To me, one is an act of kindness, the other would be funding what equates to a gambling addiction.I'm glad I'm not in your shoes. 

Put yourself in his shoes, and now he's got these "kids" coming along worrying about 0.5% and opting into higher minimum monthly payments to get it.

What would you do in our shoes?

I would call them and just let them know (nicely) that maybe shoes off is a good policy etc etc. 

If I was in your lucky shoes, I'd invest the money in ADUs and JDUs on your existing properties. 

I was in your shoes once, and ended up helping my friend manage her 4 bedroom house that we were living in as roommates after she moved to out.

I'd just suggest you take a deep breath and first imagine that you were in your tenant's shoes.