Lack of Floor Drains in Concrete Slab

What happens here

The host highlights a major oversight: not installing floor drains in the concrete slab of the mini shop. He describes how water sometimes flows from a nearby hill, flooding the building with several inches of water because there's no drainage. He contrasts this with the 'big shop' where drains were properly installed. He emphasizes that he 'was dumb' for not doing it, but also admits he 'didn't know any better' at the time.

Goal: Install proper floor drains to prevent water accumulation and flooding.