They actually came in railway boxcars. Roughly 10,000 to 30,000 numbered pieces (depending on the model) with detailed instructions. You would then haul them on horse wagons or motorized wagons to the lot.
Prototyping was engineering heavy and costly and ended up back in India due to Visa issues :-( . Used the money to validate another startup. Turns out it is easier to sell ads than build houses.