Cheap sleeps Paris?

I was scoping out cheap places to stay in Paris, and found an ad for what seemed to be an affordable and modest little studio, sounded interesting until I read this: "There is a 'bombsite' (i.e. 'hole-in-the-ground' style) toilet down the hall. This is a turn-off for many people." Um, yeah, right....

It's interesting exploring options.... maybe rent an apartment, or a sublet, or an apartment share / spare room arrangement, housesitting possibilities... what am I missing?