My family has never been "poor" but we have never had cash coming out of our ears. We live in a really nice house, but thats because we got it from my grandfather and grandmother for very little compared to what it is worth. All their kids had moved out at this point, they had it to themselves for about 15 years or so. My grandfather was over 60 when we bought it because he wanted something lower maintenance. He was a very hard worker all his life, so when he moved to a trailer park(not a run down place, everyone in the place he lives is retired), we bought it off him for about 1/3 the value. My parents are both pretty good with household upkeep, so when something needs fixing, they would do it. I would always help, so by the time we redid our kitchen, I basically did the work with my mom.
As far as vehicles go, I am learning, but my dad does not touch them, even for oil changes. My mom told me when he was 25 or so, he tuned up my grandfathers car. It went from running a little rough to not starting she said. Who knows what he did, but he does not touch the vehicles.