It's usually the opposite. In a lot of rental markets the small time landlords do even less than the minimum in terms of maintenance and upkeep, whereas the big

It's usually the opposite. In a lot of rental markets the small time landlords do even less than the minimum in terms of maintenance and upkeep, whereas the big corporate landlords at least have some basic level of organizational competence. Most local governments don't have the resources to do much enforcement so only the most serious violations are ever punished.