I'm intrigued about how artist portrays a dirty house by just having a bunch of trash bags. I mean, I cleaned past saturday and my house is a war zone (damn you, hurricanes), but that apartment looks clean, except for those bags.
I remember that episode of Beautiful Bones where a poor woman couldn't leave her house because the back door was literally barricaded by mountains of trash bags.
I don't think it's just this artist. It might just be a stereotypical way to show a trashy home in anime.