When I started dating my now wife in 2008 she was driving a 2000 Jetta with 150k miles and very little done on the maintenance schedule. Fortunately popular cars like that have strong forum communities and tons of DIY guides (or find a bootleg factory maintenance manual), I became a pro working on that car lol, timing belt, water pump, coolant, oil pan, radiator, cat, various sensors, brakes, fuel pump, fuel filter, etc, etc.
Some cheap tools from Harbor Freight or rented from AutoZone, lower online part prices, and some ability to turn a wrench and you can do most things yourself and save a ton of $ if you have a place to do it. Check engine light, get it read for free, google the code, buy the sensor (or clean it for many ABS light problems), replace, profit. Brakes pads, exhaust changes, and even to a lesser extent, fuel pumps (although dropping a gas tank sucks) it’s really not that bad. The only difference between me and most mechanics is they can do it twice as fast and have nicer tools. Otherwise unless I have to change a clutch or a timing belt on a super complicated car, I’ll try to do it myself.