I certainly get what you mean, but I do have to express concerns like everyone else does.
If she cant turn the key, how is she going to park the thing at low speeds? This is prob about 2 tons of machine and its not like your typical hatchback as my wife found out on the weekend when she tried to park the thing.
My key can be stiff to turn and mine is to do with the steering lock.
Its just simply the case of turning the steering wheel slightly with one hand and then turning the key to release the lock. If yours is the same, she will get into the habit of moving the wheel slightly before turning the key.
Not sure its been mentioned already, using the stop/start button will only start the car.
Your daughter will still need to turn the key to unlock the steering lock, and then move the key to position 2 to enable the electrics and allow the immobilizer to read the key. This personally defeats the object of having the stop/start button.
The steering lock is a mechanical lock as far as im aware, so you want get the same thing as Renualt, BMW, Audi's etc where once the keys is in it deactivates the steering lock.