@Joshua DuhonSometimes with Apartments with around 40 or less, you can use GIS mapping in some counties and they'll show you the owners name (mostly LLCs) and the owner's address.

The international property maintenance code which is the document many building department use for determining overcrowding complaints is based on the followingMinimum 70 square foot bedroom 1 occupant Minimum 50 square feet per person for two or more i.e. minimum 100 square feetIt does not address ages or relationships Many zoning ordinances have rules of more than 2 or 3 persons unrelated by blood is a violation.  

This is my first post, so I am not sure how to reply to each of you, but will address here. 

We just plan to have a small budget to address small issues at purchase time.

I'm considering purchasing two older single family homes that have separate addresses but are on the same lot and same tax and water bill.

How can I find the names and addresses of the owners to ask them if they want to sell..

The landlord shall have complied with this subsection by mailing such statement and any payment to the last known address of the tenant."

My concern is addressing the scenario when I need someone to move out or I need to be compensated for property damage, while still maintaining the living agreement format and binding nature of a lease. 

Make sure you have a forwarding address for the tenant so you can mail your determination and refund (if appropriate) within the allotted time period.

There are resources here on BP for how to do that, getting address lists, etc.