It's well hidden, took me a couple minutes to understand that I could access the house by entering the little alley next to 65 Prospect st. Once you see where it is, you just follow the numbers on the houses and it's easy to find!
I got the room in the basement. It was small but super clean and cozy, and right next to a bathroom. Bring your pillow and your towel. Everything was on point, I would crash there again!