My 16yo doesn't have any physical disabilities, but she can't handle touring for more than 3 hours, 4 hours max, in a single day and on top of that we have to take every 3rd day and stay at our resort to decompress (she's autistic). We do PLENTY in the parks. Our last trip, while we did get a
DAS we never ended up using, not even once. We accomplished this with a solid touring plan coupled with FP+. Sue made a good point about transportation though. I'm not including transportation time in this. If the 2 hours at a time includes transportation time then you're going to want to drive to the parks to save time.
Here are my touring plans from my MK days from our most. Yes, we did manage to ride all of these. As you can see, we did a lot more than 2-3 things each day. We were done around 11:45 am both days.
Day 1 9:00 am - 11:45 am
Many Adventures of Winnie the Pooh
Mad Tea Party
Journey of the Little Mermaid - Under the Sea
Enchanted Tales with Belle (FP+ 9-10)
Mickey's Philharmagic
Buzz Lightyear's Space Ranger Spin (FP+ 10-11)
Monster's Inc Laugh Floor (FP+ 11-12)
Day 2 9:00 am - 11:45 am
Peter Pan
It's a Small World
Jungle Cruise
Pirates of the Caribbean
A Pirate's Adventure ~ Treasures of the Seven Sea
Magic Carpets of Aladdin (FP+ 10-11)
Sorcerers of the Magic Kingdom
Haunted Mansion (FP+ 11-12)