I agree entirely.  Having been a landlord the comment about getting rid of bad tenants or simply enforcing the payment of rent hits home.  I am thinking of something really simple: tenant does not pay rent.  You call the cops.  The cops demand to see the rent receipt.  If one is provided the tenant is justly protected.  If not, the cops help them move their belongings onto the street.  Harsh?  Sure but so is having people living for free in your building.

The inability to enforce payment of rent is a real deterrent to building rental property.