It all depends on your driving style.
It is a trade off, have some fun whilst driving and pay early or drive sensibly you should get 35K+ out of them.
Agressive driving will shorten the life dramatically.
A friend with a new M5 went through a set of brakes and tyres in 6,000Km.
He is a GOM(grumpy old man)racer. He has to beat everyone off at the lights, hard braking and throws it into corners to show how good it is. He bitched about the cost, however it hasn't slowed him down.
Our nick name for him is 'Fangio'