Each state has a Division of Real Estate who oversees broker operations & requires broker's to adhere to incredibly strict accounting procedures, audits and care of all of this money that flows in & out of their hands that is that of the client's (you) or the tenant's.

The city code officer will guide you as to the requirements. 

I reviewed Wisc tennant landlord law and section 704 of the code and nowhere did I see a limit on length of lease when it comes to going beyond month to month.

According to the building codes, my lot is just big enough to build a four-plex.

Set the lockbox with a contractor code the same as you set for each deadbolt.

If there is not a history of these issues, I would take her but be pretty strict about anyone staying over 2 nights a month needs to be approved in writing before the third night happens. 

Laws and codes have always been ever-changing and always will be.

@Marc Possoff here is the zoning code published by the city https://www.amlegal.com/codes/client/philadelphia_pa/For a garage/ parking pad you will need a curb cut which will require a variance unless its on a backstreet which does not allow parking. 

What does this code mean?

Typically if it is a municipal lien/code enforcement lien it can be negotiated with the city after the violation is corrected.