Wouldn't the cost per square metre fall with efficiencies of scale alone? While it might cost $200 per square metre in the beginning, the costs would fall over

Wouldn't the cost per square metre fall with efficiencies of scale alone? While it might cost $200 per square metre in the beginning, the costs would fall over time. Non-standard parts installed by huge amounts of human labor vs. standardized solar panel installations dropped on site a la prefab housing?