However, the trust may be a revocable living trust that does not have a tax id and file it's own returns. 

That same day the offer was signed, another agent from the same office held an open house (without our explicit consent, post offer acceptance).

In this case, you are basically stepping ahead of the original lender, but without their consent. 

@Alex Fabiano, in most states you must be at least 18 years old to enter into a legally binding contract without parental consent.

My attorney (in Washington) set up a revocable living trust for my wife and I for this exact purpose, and explained that thIs would allow us to avoId probate.It cost $1500 for him to set up the will and trust since our situation is relatively straightforward.

It will matter that they negotiated without her consent or authorization.

My lease states The only person(s) living in the Leased Premises is/are: (the husband & wife)  A.Any change in the occupancy will require written consent of the Landlord and may be subject to an adjustment in the amount of rent. 

To NOT permit any guest or invites to reside in the Premises without prior written consent of Landlord.I think this is pretty clear that by allowing another person to move in they have breached the lease.

All in all, you need the owner's consent and cooperation.

Land Trust, Living Trust, Revocable, Irrevocable, Foreign Trusts, etc etc, the general basic of it is using a self serving spend thrift trust with asset protection provisions in the trust.