The low cost of living doesn’t make WV attractive. The low cost of living is a side effect of being such an unattractive place to live unless you are independently wealthy. There are no job prospects, no areas large rnough for anything larger than self-sustainig family farming, and the only places flat enough to build houses are flood plains that level communities every decade.
If you manage to build an eight figure retirement account, then i can see why it would be tempting to retire there, but at that point you can retire just about anywhere.