I get what you are saying about imposing... but at the end of the day she would have control of it, so could manage it and dispose of it in the event that things went awry.  

What are some ways to buy property without any further state liens being imposed?

For this neighborhood and price points, those were huge and unnecessary asks to me. 

So you have some onerous city imposed requirements to fulfill.

I don’t want to allow this because it seems unnecessary)-Mount her t.v. to the wall (not happening)-New shower head (current one is brand new she just wants a “better” one)

Be sure to check state and local laws regarding imposing late fees; in Oregon they technically have until the 4th before a late fee can be imposed, and only when the dates and fee amounts called out in the lease/rental agreement.Give them the notice - you're their landlord, not their friend.

But, as I understood your original question, this is a situation where your friend is asking if he can impose himself in his daughter's apartment, whether she wants him to or not, if he's a cosigner.That's an entirely different picture, in my opinion. 

They pay rent on time, take care of the place, follow the terms of the rental agreement, and don't cause unnecessary drama.

The tenant will need to follow all of the laws about running that business and there can not be an unnecessary burden on the landlord. 

This only causes you unnecessary work and "muddies the waters" legally.