As landlords, we obviously have language prohibiting these sorts of actions on the parts of our tenants. But that isn't just because of our own greed. Tenement

As landlords, we obviously have language prohibiting these sorts of actions on the parts of our tenants. But that isn't just because of our own greed. Tenement homes/boarding houses get worn down quite a bit faster than rentals. It's easy to end up with the property completely trashed, it's easier to get sued or otherwise in trouble, and it's easy to end up with neighbors complaining and disliking you. In addition to all of that, often codes simply don't allow boarding houses, regardless of who is running them. One of our renters tried to run a boarding house without our knowledge, and when the police were called to one of their parties, the city threatened to levy considerable fines against us for running a boarding house, regardless of whether we were actually running it or getting any money from the tenants.