Have you determined if there are materials that a local library or genealogical/historical society has that may be helpful to your search? Frequently individuals in charge of these collections are uniquely positioned to be aware of research nuances in the area and their facilities may have specialized materials not available elsewhere.
A Google search for “yourcounty yourstate historical/genealogical society” may get you on the path to more information.
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It’s also worthwhile to look for Facebook groups for the county and state that your ancestor was from. I’m getting invaluable clues from a Perry County, Arkansas group that focuses on history. Found one 4th cousin already there who had photos from the 1890s and 1900.