Do you see many other rentals in the area, signifying some kind of demand?

I also won't address the divorced comment/my marital status because that is irrelevant, as well.  

If things don't work out, and they sometimes don't, you risk losing your home, which could lead to some severe marital problems.

"Familial Status" is a protected class, but that term only pertains to people who have children or are pregnant; it doesn't pertain to marital status. 

She hasn't lied to me since I didn't ask marital status, but I would be shocked if the husband didn't move in too.What would BP do?  

Doesn’t a lower cap rate signify lower risk?

There are so many ramifications, including marital issues, tax, estate planning, etc.

So, when I dig into the ownership of the assets to include the liquid assets, I see assets that are held tenancy by the entireties (marital assets).

The fact that you can only put 20% down on a property, less with certain loans but still get 100% of the increased equity as property values rises over time is a signifiant advantage over other investment vehicles such as stocks, crypto, etc.

I'm not versed in marital/tenant law but this seems like terrible advice.