I would guess that around 90% don't know what they're in for, especially the stoooooopid costs of some parts.
A smart owner DOES "nickel and dime" in some ways, mostly by educating themselves and doing the same maintenance for less money.
For example, I will frequently source parts myself. Possibly the most extreme example was the shop wanting to charge $1900 for a new manifold pressure gauge (with 60 day warranty!), I bought a used one for $36 with a 30-day warranty. It's usually not that big of a difference, but it's not uncommon for me to be able to save 25-30% on parts by shopping around if I know they need to be replaced soon.
This!!! That's where the remaining 10% who *do* understand what they're getting into come from. I was on the board of my flying club for eight years before getting my own plane, and served as treasurer or maintenance director for most of that time. There are many expensive lessons to be had in aircraft ownership, and the more you can learn with other people's money, the better.
It looks like the T-6 burns about 32 gph in cruise, or about $160/hour for fuel, *4 = $640/hr so it seems 4x fuel still works...
I think many people just have NO CLUE what maintenance really costs. Labor is fairly easy to understand. Parts... Man, there are a lot of parts that would be $12 on a car that are $1000 on an airplane.
But they'll look at that $50K Viking and think "That Dan guy is wrong." So I now use a slightly different version of this saying: "There's nothing more expensive than a cheap airplane.