If you want a new premuim car, then mobility is definitely beneficial as the depreciation alone will be more than the 10-12k cost of mobility and ofcousre the stress free nature of all inclusive motoring is a bonus.
However, if you are happy with a small every day car, for example a new dacia sandero can be purchased for around 7k mark and have a 3 year warrante for peace of mind, servicing packages are cheap £399 for three years deals plus add around a £1k for insurance over the three years and youd be considerably better off. After three years the car would be worth around £3k maybe a little more assuming your low mileage, so all in all it’s cheap motoring.
It’s just a matter of need v wants!