Presumably, before your daughter gained her license she was being driven about by yourself?
As stated, if you keep on the scheme, it is your preferred option. Go back to how it was before?
If you leave the scheme and get a 2nd hand car, the insurance (£6k) is obscene. Then the vehicle adaptions over and above that
Even if there is a company that leases vehicles suitable for adaption, they would not take the lease on with the conviction.
Maybe someone on here has been in a similar situation and found a solution.