Tl;Dr: It varies very drastically by locale. Rural Americans can often live okay on "very* minimal income. Standards on what " poor" and "normal" vary about as widely between parts of America as they do between America and where you're from.

Where I live (Dallas), I'm making around $40,000 in an area where the median is $60,000. I live alone, but I will have to buy a new car this year and I will barely be able to make my payments. I do not have a college degree, and I'm still basically entry level.

I've been looking at moving a lot recently. If I moved where I want to live (Oregon), I'd probably make the same or slightly less money, and my rent and expenses would probably rise by a few hundred a month. In effect, I would barely be getting by if I didn't have a car payment.

I've also been looking at Chicago, where the median wage is slightly less than I make now, but cost of living is slightly lower, and I'd make slightly more. I also wouldn't have to have a car, so my disposable income would rise drastically.

The Murderbot Diaries.

I've been enjoying it, it has a surprising amount of heart for a series about an emotionally damaged not-robot.