Here's Kiplinger's top ten towns for cheapskates, though I'm not sure how useful this is for you (I'm on disability and living in one of those towns. I believe Saint Louis was one of them as well, and I think we have some LWers from thereabouts.).

If transportation is an issue, though, you might try finding a way to optimize for a bigger city where public transit is actually a thing. It depends on your abilities and the amount of your fixed income.