The rest of the properties will be held and drawn down during retirement and/or passed to her kids in her estate.

So, if some people stop paying (or move out) the rest are liable for the difference.Check with other landlords renting to students (easily done via Craigslist in your target market) typically student housing rents at a premium, especially if the Two Mile Rule is obeyed. 

Preferably in a market that is extremely low-end compared to the rest of the state. 

I would mention that I had the letters and see if he wanted them.I have offered or returned items in the past most folks are surprised only ran across one nut who had rented a place 30 plus years before from a couple we got it from.They had stored a lot of stuff in the attic I was warned she would be a problem and to keep what I wanted and trash the rest but I insisted on returning the stuff so I called and I hauled the boxes and luggage to her  She started with calling me a thief,actually called the cops in the small town saying I robbed her That I kept antiques coins other junk(cop got a kick out of it and said I shouldn't have gave her anything back)her husband said that they had forgotten about the junk  She told people in the area I was a crook for awhile  lol Later she went to realtor school and offered to help me find property

Rest assured I entertain no thoughts that this will be easy.

As well as the specifics on the rest and the extra costs to think about.

With the terms agreed, I hand that back to the servicer who takes care of the rest. 

We have the opportunity to buy 20 more using seller financing at 10% down with the rest amortized over 30 years at 9%.

Grab a map, go to Google Maps, and look to see just how small Detroit is in comparison to the rest of the state.  

The rest of the family want to get rid of the home since it is too much for the brother and want to get him in some sort of assisted living.