Mom passed and they are saying I have to. I don't have money for repairs and it would never pass any code for sale. They are telling me I have to make it sellable, but it's not my home and she passed. I don't have the money for an attorney either. What do I do?
Send them the keys and move on.
These government agencies will threaten, bully and manipulate even when they are in the wrong. This is one of those times. Tell them to go sue their client and give them her current address. They are so stupid they will probably send a dunning letter to her final resting place.
Do not worry about this, it is not yours to worry about.