Starting off my saying I'm in my late 30s, have 2 school aged kids, daycare is behind us but sports/activities are hundreds a month, and we are in the "messy middle" of life right now.
We're in the "messy middle" right now too. Do you watch The Money Guys by chance?
I would echo most of your sentiments since we are in the same area of life (I am 40 and have 3 kids in beginner teen/tween phases).
For us personally, we've never held consumer credit card debt (we use a card for daily purchases and pay in full each time) and our mentality is that's not even an option barring some really catastrophic thing. We have had some catastrophic medical things happen to 2 of our kids unfortunately, but were able to get by with our high-deductible insurance plan and money my husband has slowly squirreled away in an HSA. My son walked away from the hospital with a $67k bill that we paid I think about $13k out of pocket for all said and done.
Financial Stability for me personally also means if one of us lost our job or if God forbid something permanent/long-term happened medically to one of us or the kids, where one of us needed to stay home to be a caretaker, that we would still have the same ability to pay all of the bills on a single income. We do have a mortgage and all that goes with that (utilities, property tax, insurance, maintenance, planned large replacements/repairs). I would love to go more aggressive on the mortgage, but just holding steady on that 3.75% interest and regular interval payments for now, but may change in the future. No car payments, they bother me personally. That's just a me thing, but plays into the whole "should be able to live one one income if needed" concept. We wouldn't need to worry about the repo man or anything if things were really tight and could solely focus on the roof over our head.
General big picture, having positive net worth and focusing on how to make the best use of a combination of investments to make what we make go further is the season of our lives right now. Right now we are in "pain mode" because my DH likes to max out his 401k during the first half of the year so his take home is miniscule, plus I'm self-employed so I just paid my quarterly taxes. E-fund is in a HYSA, I recently converted my kids paltry savings accounts into CDs, we throw bits at money market funds and stuff like that -- we aren't high income, but just try to take advantage of current interest rates and try to stave off some of that inflation pain the best we can. We have enough in an emergency fund to cover large things like septic failure, HVAC failure, or income replacement for about 8 months. It would still take a good chunk of time and cutting in other areas to replenish it, if for example we needed $10k to replace the septic system. That's always at the front of my mind because the septic system is original to the house (1963) but still doing great so far.
Daily habits help fund all of that I would say. I don't buy new phones (used/refurbished from
Amazon does just fine), meal plan based on sales, grocery shop at Aldi and
Walmart, buy kids sports gear used on Marketplace when possible, never had cable TV, don't buy the latest fad thing every 5 seconds, do my own (very) basic vehicle maintenance (hoping to do more myself in the future, I do oil changes now but want to add brakes to that at the least), look for good solid wood furniture to flip on Marketplace before opting for something new, grow some vegetables, only buy coffee out when I have gift cards, primarily cook at home, groom my dogs myself, cut my husband's hair, among other stuff. We do 98% of all home improvements and repairs ourselves. Living below our means is what enables us to have the ability to have some extra bucks to throw at retirement or go on a vacation or sign my kids up for sports.
My next main worry is kids college, which we've never been able to set aside extra money for. I'm trying to steer them either towards public, in-state university, or do community college for the first two years like I did, or trade school. And if they do need to take out student loans, to try to get them to really consider what the ROI is going to be and if the income they will realistically make makes sense to take out the debt for. No loans for underwater basket weaving, in other words. I'm hoping to be able to help at least partially but our retirement has to come first. Hoping decisions we are making right now will compound in the future and help us to cash-flow college in some capacity. Right now that's still in the hopes and dreams department though.
Wow that was a book sorry. Just something that is on my mind a lot I guess!