Actually I bought a new I-Pace three years ago so happy to answer any questions.
You may wish to update your calcs with the following:
Extended warranty. UK cars come with 3 year warranty. Extended JLR warranty with Jaguar Assistance is absolutely must have. It used to be £700 last year but it’s about £1000 per year now. https://jaguar.motor-admin.com/warranty/vehicle-details-1
Vehicle subscriptions will expire in year three (online sat nav, data, security tracker). It costs about £280 per year I think.
Second year service is about £300, 4 year service is in the region of £700 as it involves replacing the brake hoses.
Probably it is the best value for money out there at the moment. There are some annoying design issues (intelligent wing mirror heating, no rear wipers, passenger side mirror is not auto-dim etc) still it is a very nice car. Great drive, comfortable ride, spacious cabin, ridiculously fast.
However it’s fairly outdated in terms EV technology. Very inefficient, low motorway range, very slow “rapid” charging. I’m thinking of voluntary terminating my PCP and either buy pre-reg one or buy back my own for peanuts.