Don’t forget the C182 has 6 cylinders and a shorter TBO (than lyc powered aircraft) plus it is quite common to perform a top overhaul well before TBO.
Operating expenses will likely be a bit higher on the 182 than any aircraft with a 4 cylinder lycoming and a 2000 hr TBO..
It would be interesting to compare the all in operating expenses of a C172RG and a C182.
The 182Q with the O-470U has a 2000 hour TBO.
Our 182P with an O-470S kinda fits your mold, someone misflew the engine badly and it needed top work at around 200 SNEW.
It hasn’t needed top work ever since. We’re about 200 from the 1500 TBO now. I suspect we’ll fly it well beyond TBO and watch for it telling us when it’s time. They usually speak loudly when it is.
The tales of needing top work aren’t as prevalent amongst other O-470 owners as it once was. People tend to treat engines better these days. When shade tree cylinder replacements and overhauls were half the price they are today, people just shoved everything forward and went for “full rental power” all the time, even when they owned it.
As engines have slowly become half of the entire value of the aircraft, people started paying attention to engine operation more.
Upgrading to a P.Ponk conversion at rebuild time is the common way to gain a 2000 hour TBO after an O-470 says it wants a break. And (arguably) another 50 HP or so at sea level. Quite a few 182s on the market with that already done.
O-470 is a pretty non-fussy engine overall. People do abuse them however or sometimes get caught up in the horrid metallurgy problems of the cylinder replacement world that plagued everyone for over a decade. But the bad old days of top-overhauls slowly went away as Continental fixed things about the design. Generally the later the letter model of O-470, the more of those little things that plagued the valve train were addressed.
And of course... You can make a 4-banger Lyc as expensive as a good rebuild on an O-470. Just buy one in the factory crate.
(I know someone who wanted that and wrote a $40,000 check.)
Just depends on what you want.