Japanese Autosport web is reporting Stephane Ratel interview.
https://www.as-web.jp/sports-car/500609?all
*Four pillars for the success of customer racing cars
To succeed in GT3 as a customer racing car, you have to reduce costs.
It's very simple.
The only engine rebuild cost is high manufacturer is Ferrari. But that's because of their brand value.
The price of the chassis must be less than EUR 400,000 in Europe,
the life of the engine must be 20,000 km,
and the rebuild cost must be reasonable.
This is the basis for success with GT3.
Besides, the assistants are also important, and if the team needs parts, they have to build a system to order them on PC and must arrive within 48 hours.
Selling prices, running costs, assistants, and manufacturer support.
This is an important four pillar in customer racing.