I had a favorite curry rice restaurant when I worked in downtown Tokyo. The owner/chef made a great curry rice for a reasonable price, but operated on a shoestring. He rented a floor above a fancier restaurant and had a small display at the entrance to the stairs, so he put out the actual food. He probably ate it before he closed the shop for the day.
High quality “prop” food for photography or display is not cheap at all.
I never saw anything like the plastic food displays in Tokyo! Isn’t there a street there devoted to many manufacturers of fake food?