Any dog can be raised to be a fighter and bite people.Here's our pet language from our lease-PETSNo animal, fowl, fish, reptile, and/or pet of any kind shall be kept on or about the premises, for any amount of time, without obtaining the prior written consent and meeting the requirements of the LESSOR/LANDLORD.

Makes a big difference IMO if there wasn't written Tenant consent.

Except as detailed in this consent, the SoFi personal loan may be used for legal, personal, family or household purposes."

While dealing with that I learned she painted without my written consent.

Adding language in the body of the contract clarifying assignment that states something like: "The has the right to assign this contract without the consent of the seller" is the strongest clarifier the buyer can have.

Or make laundry a revocable privilege. 

Another thing I would research into is if your state allows reporting rental history to credit agencies and if you have to get consent from the tenants.

In addition, if you have not already done so - get written consent for that security system if it is a hardwired system.

And yes, often this type of trust is called a living trust, revocable trust, or a family trust, or also grantor trust (which refers to a specific tax designation).

It seems to me that you should have some sort of recourse against the family you leased to, as well as the ability to remove people squatting on the property without your consent.