Individuals shouldn’t allow themselves, or perhaps government shouldn’t allow them, to own a home with more than two bedrooms, one they sleep in and a spare one.
There’s no good reason why a single person should own more than two bedrooms.
If they have a family, then they should be allowed to own one more bedroom per child.
As far as charging rent goes, it shouldn’t exist, it’s exploitation.
The vast majority of people with very few exceptions, simply don’t need more than two bedrooms, it’s not a need, it’s a luxury, and people shouldn’t allow themselves, or be allowed, one of the two, to have much more than they need.
There are costs to individuals, their community, and nature.
The more people with more unoccupied rooms there are, the less space there is for everyone else, and the less room there is for nature.
Thousands of species have already died off due to man’s greed, and thousands more will die off in the near future, if we don’t begin cutting back on our excesses.
The diminishment of nature doesn’t just harm itself, it harms us, without nature we couldn’t survive, and so room must be left for it.
There are costs to individuals too, the more stuff someone has, the more they must work for it, and working hard to buy lots of things you don’t need and maintain them, is a mental illness, to risk what one needs for what one desires.
Having a home of some size is a need though, even foxes have their dens and birds their nests, but there’s no need for one person to live in a mansion all by himself, or use his other rooms to exploit people.