Not being an attorney, I cannot judge whether such structures provide the legal benefits they are meant to provide and whether they are necessary.My main beef (substitute soy if you're vegetarian) with them is that investors do not follow the burdensome formalities required to maintain integrity of these structures.

Usually they will provide an estimate or change order, not an entirely new contract per se, but yes, you would have to agree formally to something. 

If it does not phase them (they are the new breed landlord) then make sure they realize that you will be bringing an action, once courts re-open, for a formal eviction and back rent, the payment of which will certainly be pursued by you... i.e. they may be short on future rent.3.

Are you current on the above formalities and paperwork?

They do in house evaluation for the ARV and no formal appraisal.