Not having any oral history from your Grandfather makes finding things tough.
I know my great grandfather, Robert F. McAbee, took in a lot of relatives over the years that needed a place to stay. I'm guessing that's why William Thurston was living with him. Robert F. and his family lived in Marmaduke Arkansas so possibly the photo was taken then?
I'll note Sarah Hardey (Hardy?) in my records and keep that name in mind as I search. I sure wish I knew more about the Selfs. Unfortunately, Rachel didn't pass much down to her surviving son or her daughter in law. So I know next to nothing about this side of the family which is why I've not been able to make more progress searching. Would help to have more names, accurate names, etc. Sigh.
I'll save your email address and let you know if I run across any other information.