May be worth looking for a good example from a dealer at the time, probably with a better service record and a warranty for less money, If the car is being sold to the Motability customer it doesn’t get a service at the end of the 3 year lease and you would have to have that done at your own cost.
My last change was due 4 months after my lease was due to end and as such it had it’s MOT done and a service, when it arrived the week my lease was due to end I had a call from Motability asking if I knew it was going to arrive early as if so I should have informed them so they could have cancelled the service as they don’t do the last service as per their policy, when I questioned them about this if I was buying from them they said it would be my responsibility.