Didn't tell me but I found out when changing out an AC filter. 

You need to know how to input filters to remove everything but vacant land.

My feeling is that Mom and Pop breathe the home, while larger may have greater access to booking tools?

Try looking into zillow/Redfin and see what your potential rents you can get near the neighborhood by filtering the bedrooms/bathrooms of the intentional property that you are planning to buy.

The 20% is set aside it's just nice to have some breathing room to do a few extra remodel things while the building is empty. 

I have a tab for each property and keep all my income, expenses, tenant info, AC filter size, Insurance policy # etc all in one easily accessible location.

You can filter by investment minimum. 

I was holding my breath for October, as I knew it would be the “first test” of her ability to make payments on time.

You could ask for the appraiser to send it to you first, but I wouldn't hold my breath on that.  

Many of these kids are living in their first house, so don't expect them to know how to change a furnace filter, report a leak, etc because either the Dorms did it or Mom and Dad did.