To buy a 750S new? Hard to really say because it depends on your net worth and how you’re spending your money and where you live. A single person in a low cost of living area could buy a car like this while making $400-500k maybe, but you’d need a lot more if you’ve got a family or live somewhere more expensive, or have a lot of money tied up in real estate.
Everyone’s situation is different so it’s hard to say. Especially because there’s a level where you can buy a car like this, but then that doesn’t necessarily mean it’s a financially responsible move.
Eh trying to say Nurburgring times are useless is just as circlejerky as treating them as gospel.
Ring times are a rough measure of relative track performance. To be useful, one has to consider the context of the lap time(s) like the driver, tires, whether it was a factory effort, and whether that manufacturer is prone to cheating.
So if a car is with 5-7 seconds a lap of a comparable car, generally they’re in the same ballpark, unless there’s something out of whack with the lap times, like one car on a vastly superior tire.