Makes no sense. Just makes no sense. Whether she was walking, being carried, in a wheelchair, on a stretcher, dead, alive, whatever the case - it would've been much easier, more efficient, and far less risky/chance of being seen, if NG was removed from the back of the house where it was level ground and no steps. And then easily walked/carried/led around the corner/gate by the garage to a waiting vehicle.
So why the front door? Why the narrow path? Why the steps? Did he want to be seen? Was this a production?
JMO.