There are toy motors you better don't try to stop with a finger. They burn it pretty fast. Lifting a weight of 500 to 700g doesn't require a high torque motor. It just requires the right transmission ratio. (See model cranes in toyshops)how much easy you make my work with a toy motor, which one can stop with just putting a finger on it,
I have the impression you never saw a wiper motor.and about car wiper motor, dude i am not going to make a boeing aircraft with such a heavy motor, but thanks for your suggestion.