Quote from @Jared Khan: Thank you all for your responses.

I know the founders personally, and the ability to call or e-mail when I have an issue and get a quick, personal response makes it worth every penny.

However, this does not release her from the mortgage responsibility unless the loan is paid off or refinanced.3.

I submitted an offer and there hasnt been a response.

Thanks for the response Kristin. 

We also have a stern conversation with them about not hiring vendors and that they would be fully responsible next time.

Appreciated reading every response on this post. 

@Jaron WallingThank you for the response and insight.

While you can't create limitations against their lease and legal rights they have for quiet enjoyment, things like keeping common areas free of clutter or routine maintenance items that are tenant responsibility can often be added to help keep the expectations on both parties clear.

Spell out the complete agreement of how expenses, profits (or losses), and other responsibilities are to be split—put everything in writing.Do a background check on the partner to confirm there are no outstanding liens, judgments, or active lawsuits against them.Hope these suggestions help.