One factor to consider is how many people you have available to push, and their strength and stamina.
One trip, I broke my foot upon arrival at the resort. After spending the evening at the ER, I decided to try a manual wheelchair for our park day, with my groups support.
It turned out that there were a LOT more hills, ramps, and uneven surfaces in the parks than we had counted on. Even splitting it up between me self-propelling when I could and switching off between anyone else in the group who was able to, it was just physically too much for us.
And some of those ramps are REALLY steep! The ramp to get into Soarin made us feel like Sisyphus impersonators! Wed have to put the brakes on the wheelchair every time the queue stopped to keep from rolling back, then take them back off and dig in to start again. Im not a tiny person (5'10"), but Im at my target BMI, and Ive got reasonably strong arms. The friend who did most of the pushing was a six-foot man raised on a farm.
I called the rental company that night, and they brought an
ECV the next morning.
If the pushee is small and light, and the pushers strong and athletic, it may not be the issue it was for us.