SUV with long front legroom

The cars you list are:Cadillac XT5 or XT6, Audi Q8, Q7, and maybe Q5 and Jeep Grand Cherokee

First, elminate the Jeep. Their reliability is horrible and even worse it seems since Fiat took it over. This is according to everything online including Consumer Reports.

Next up is Cadillac. Better than Jeep, but they do have a lot of electrical issues. The only saving grace is the CT6 is based on the same platform as the Buick Enclave, GMC Arcadia, and Chevrolet Traverse. They are all based on the new GM C1 platform of different lengths. Electrical issues have been reported but the power train generally speaking is fine.

Last comes the Audi. They have been working on their reliablity for some time now. Still not as good as Lexus, but it is better than the above options. If you are restircting yourself to these options, it is the most reliable brand. Since you already found one at discount I would go with that.

Best of luck.

I think you should take a look at the new Lincoln Aviator or Lincoln Corsair with individual separate extending thigh support adjustments. Reliability will likely not be great, but neither are the German cars. Within the last couple years Lincoln has gotten pretty good while Cadillac is still part-sharing with the rest of the mainstream GM lineup (we see this with the XT6 among many others). I would skip the Cadillacs and GM cars as they are not class leading right now except they have decent space on the inside. The brands mentioned so far also don't have Lexus-like reliability.

Audis might be good. I personally think they have stiff-feeling seats. That might be a problem for you. If you want soft seats, Lexus has some. Look at the refreshed 2020 RX for that.

Acuras aren't as reliable as they used to be, but you might like the RDX. It was my wife's second favorite interior at the LA auto show. I really think they did a good job with it. If they could improve the rest of their lineup it would really help Acura.

I looked on Consumer Reports for front leg room measurements and found that some compact Luxury SUVs (BMW X3 and Mercedes GLC) have more front seat leg room and head room than the Audi Q7 because the compact SUVs don't have a third row. You might not want to spend so much to get a big SUV like the Q7 that you won't utilize. The Corsair doesn't have a lot of front leg room. You can probably but the wheelchair in the trunk with a back seat folded.

On your list of cars, I would go with a Q7 or Q5. The most reliable on that list would likely be the Audi, but then you would have to pay a lot for maintenance like you probably know. The Grand Cherokee is the cheapest to fix, but the quality just isn't there. The Cadillacs are pretty cheap to fix as well with their V6s, but will likely break more often.

Don't get the Audi Q8. It is a Q7 with reduced interior room and a higher price.

Getting a CPO Q7 or Q5 off lease would probably be a great buy, since usually automakers give a 7 year 100k mile powertrain warranty from original purchase date and mileage.