Few years ago my dad and I got an old electric motor and attached a cable and hook to the crank on the motor. We mounted the motor on a post int he rear venter of the hanger, now we can just pull up the the hanger and swing the tail around. Then we just have to put the little motor in reverse to wind the cable out and attach it to the tailwheel assembly via a hook, and then just have the machine roll the plane into the hanger. It basically works just like a winch you would see attached on the front of a truck.
To be honest though it was very cheap to make, but we can just roll the plane into the hanger ourselves in a third of the time.