I've lived in about every demographic area of the USA and the only thing that would have gave them away to me as poor in your SUV/walmart story is that they were all fat. Being fat is the best marker of poverty in the USA. The rest just sounds like the lifestyle of Warren Buffett which isn't terribly unusual as the comfortably rich generally only worry about flashy cars if they're a motorhead and often get there in part by being thrifty.
Buffet is well known for "slumming it" at times. He drove a clapped out hail damaged ~decade old mass production model Cadillac like everyday through McDonalds. This is pretty inline with stuff I've seen from comfortably rich families.
>edit: oh fuck me its this goddamn bot poster who just lies to your face
