Where did you get the 100,000km figure from? A lot of the USA guys seem to pop their motors at around 100,000 miles (160,000km) But this is with stock motors that are thrashed all the time.
Rotors can last for ages if you just treat them right. No need to let them idle in the morning, just jump in and drive it slowly till shes up to operating temp for a few mins,then u can thrash it. Do oil and filter every 5k (use a mineral blend, not a 100% synthetic).Make sure your OMP is working or just run a premix. Never over heat them, a big one for fcs because once you slap a fmic on your cooling is drasticly reduced. It's all really common stuff to be honest. If you follow this then they'll last you for ages. And honestly, who owns a car for more than 160,000 km? If you avg 15k per year thats like 11 years.
If you're serious about an FC jump on ausrotary and have a search around, put all the myths to rest