In this video, the narrator says Munro and Associates have evaluated Aptera full scale production facilities and said only 23 people will be needed to make 10,000 units per year. This is absolutely amazing. I assume that does not include inventory people, office people, etc.
One area I would look into deeper to push the ultimate efficiency paradigm farther is the tires rolling resistance. That's where the other big chunk of energy consumption goes. Unlike drag, which in Aptera's case only becomes very significant at higher speeds (Roughly: 30 to 40 % gain around 40mph and multiples above 60mph), rolling resistance and tire slip affect efficiency at all speeds. So, it's as if one were to say that tires rolling resistance is a more important issue to tackle than Drag if one is to pursue the ultimate efficiency goal. However, this is a field that even tires OEMs are still quite evasive about. It all takes place at the zone of contact between the tire and the road and within the tread ply of the tire. The impact from one type of tire to the other may be multiples. Drag and rolling resistance are the only consumers of the vehicles net mechanical energy delivered to the tire.