Ok, a few points of fact.
if you are a wheelchair user and you require adaptations to a car there are very, very few places where you can buy a car and get it adapted. It’s basically not possible.
you pretty much have to go through motability. Because they deal with the majority of the business in adapting cars they have processes in place and are used to it.
when I wanted a wheelchair hoist installed in my existing car it was a bloody nightmare trying to find someone to do it. We gave up in the end.
also, for wheelchair accessible vehicles the minimum upfront payment (which you do not get back) is for a Citroen berlingo of 4095.
so you need to pay 4k upfront just for the cheapest possible wav (wheelchair accessible vehicles).
you’ve therefore got to have access to savings at a very minimum to afford a wav. Lots of disabled people can’t.
it’s also worth noting that the nhs pretty much does not provide disabled people with wheelchairs anymore and that motability can also be used to lease a wheelchair. I know many people in that situation who lease a wheelchair because the nhs don’t provide them anymore and therefore they can’t have a car.
if you are poor and disabled it’s a straight choice between wheelchair and car.