I have a house with a 24-slot storage cabinet. Having made a lot of currants recently, I wondered whether there was anything better, so I perused the realty pages. What I found was that all houses of good quality like mine were sold, while the market was swamped with cheap low-quality houses with 9-slot storage.
Apparently there is very little demand for low-quality housing. As housing is instanced anyway, wouldn't it be better to offer less cheap houses with low storage capacity, and more houses people actually want?