"rather I'm just VERY good at money management"
No you're not...perhaps you're just living a simple life, that may be.
You make less than $10,000/year.
I'd like to know how you afford a somewhat new vehicle. (3 years old is considered somewhat new btw). But for even most cheap new or nused vehicles, you're looking at around $250+ easy.
So of your $850. We've dropped it to $600.
"I drive in a 2005 Buick Regal that I got for some trivial amount some 5 years ago (I think $1,500?)"
Let's see, so 5 years ago, 2009. You got a 4 year old Buick Regal for $1,500. Okay, so in other words, someone handed you a gift horse? or you bought a stolen/damaged vehicle. Because you'd be hard pressed to buy that car for $1,500 today. Ah...salvage title, now the truth comes out. Not every state allows those to be easily registered btw. Nor are they always safe, all appearances aside.
And individuals with children should be extremely cautious about taking such risks.
"my tablets and smartphones seem to do a better job at those tasks."
You've admitted to having tablets and smart phone.
Let's knock off another $50/month for those.
Okay, so you now have $800/month. This has to go to rent, food, etc.
How much is your rent? Are you freeloading off a friend/roomate who covers most of the burden (mortgage, heat, utilities) and is just look for a roomate to ease that burden and drop some spending cash in his pocket?
Let's say you're frugal on food...$75/month?
And you still do some major travels, internationally? Disney? etc? We're not talking about freeloading with friends or camping.
Sorry, I'm calling BS on this. That doesn't mean you don't have an excellent life, one that likely brings you far more happiness than most. Nor that you don't manage the small amount of money you have very well.
That's cool that it works for you. And simple = good. But you don't really fall into the middle class.