How should I make this model for a sEnt?

I want to make this airplane with ailerons, elevators, flaps, a rudder, and a propeller which can all move along an axis.

I don’t know whether I should make the ailerons/propellers separate props (like Sakarias88’s Helicopter) or make them on the same prop with ragdoll-type constraints.

Which works better? Are the hitboxes the same? Which is easier?

You would probably want them as separate props, and put appropriate attachment points on the main one. Either that, or use layered animations, but that would be rather difficult.