Your house is your financial nest egg for your own care later on. Your house cannot be taken from you to cover cost of care for your husband.
Could you ask your neurologist or cancer doc to connect you with a (hospital?) social worker so you can know what all your options are? The social worker can also help you with the decision as to if it is the right time for you and your husband for other care and alleviate the guilt you might be feeling.
(I’m not looking forward to that decision either.)