The amount of housing for poor introverts is small

I will tell you, being quiet makes you a desirable roommate (flatmate?). The bar is pretty low. Have you posted in a local queer housing group? A lot of people seem to need roommates and a quiet loner is better than a friendly but obnoxiously loud/messy/bill-skipping/etc roommate. Of course that means you need to live with comparatively more extroverted people but that might not be too bad.

I wish this country had social housing.