You already asked this question, and got told the answer. It doesn't make sense.

single one bedroom / single two bedroom / etc. It means that each room holds only one bed.

That sentence doesn't make sense to me. "Single" means "one", so if it were "single-bedroom" OR "one-bedroom" it would be correct. In other words, there are two adjectives before "bedroom" that mean the same thing. I think it's supposed to be "house for singles", meaning a house for one person.