Pushing an adult in a manual chair is difficult indeed. My son is 170 pounds now, and not mentally able to use an
ECV. I am getting older (64 now). Fortunately for me, I can still make him walk some of the time, so I do that on some of those inclines. Even ride queues in and out are hard. I am looking at YOU, Space Mt, Soarin', Flight of Passage, etc. Plus, Entering AK, the monorail ramps (except Epcot!).
I have begun looking at the power chairs with a control on the back so the "attendent" (ME) can control the power function. So far, they look complicated using a joystick contol. I would rather push most of the time and just press a "power assist" when needed, using hand grips like bicycle brakes or a bar like on a lawnmower. Plus they are heavy and look tricky to fly with, (the rechargeable batteries).
All in all, I defintely feel lucky my son only uses a chair at the parks, zoos, museums, parks, just places he needs to walk a lot. And I really groan when people in the
ECVs fly by at a really fast speed, like they do when they see low crowds, sometimes it is couples flying by us, while I struggle lol. I say we will need a 2 seater ECV eventually, ha I guess if that happens, no more Disney.