[Cajundaddy]

Find a good attorney in your state that handles this sort of situation. I would personally get daughter and grandchild out of the house and in a safe place first. After that I rather like the idea of having a man to man with him and ask him his intentions as the rightful owner of the property. If he has a substance abuse problem he probably always needs cash so he might take $1000 to just walk away. If not you can go to plan B.

Showing up with a wood chipper behind your pickup and asking if he would like to help out on a project tomorrow. You've got some brush that needs clearing out in the woods and you will pay him $500 for his help. It shouldn't take very long....