The most expensive Lambo service at a main dealer is £1995 and is only required every two years or 15k, minor service is only £795 every other year also. No prior or post track inspections needed. No loss of warranty turning the VDC off.
I just get the feeling that Nissan pitched the purchase price too low and are now looking/needing to recoup as much as possible which is the wrong way of doing things imo.....
With the financial hoops you have to jump through to keep the warranty you may as by a sub £50k JDM already in the country and get it serviced by indy's and stick two fingers up to Nissan!