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If I were you, I would consider getting a Guardianship and Conservatorship over your husband. So many times, taking a lot fo medication makes a person vulnerable to people who try to "prey" on them. You need to get Power of Attorney at the very least. You should also consider getting a restraining order against the minister who is trying to get your husband's property. There are a lot of options.
But, get busy right away to take care of these things. He might be coerced into really tying things up, to the point that you cannot remedy the situation. Contact a lawyer who is familiar with this area of law.
I wish you the best of luck.