POFQ has elevators in all buildings. To my knowledge, resorts with no elevators include: CBR has no elevators, the Alligator Bayou section of POR has no elevators, and some (most?) buildings at OKW have no elevators. All other resorts have elevator access to all buildings.
Regardless, any request is just that - a request and they will try their best to accommodate "medical need" but not guarantee. We have requested 1st floor at CBR and it was granted. But this past fall I read a report of someone at POR Bayou who had an
ECV and was still given a 2nd floor room and the resort was unable to change it. If it's an absolute need, I recommend booking appropriate and not relying on a request.
Enjoy your vacation!