She should wait until he goes to the Kingdom Hall, and change the locks.
FCUK leaving behind what SHE built. You say she is the one financially responsible. Why should SHE have to run away like she did something wrong?
Change the locks, and get a restraining order. Tell the Police he left the home, and she doesn't want him back in. He can come get his belongings ONLY if a police officer is present. They will facilitate that.
But to me the biggest problem of all, she hasn't had enough. She needs to get to the point where she has had enough and she is ready to take ACTION instead of just talking about it!