Getting in home care for spouse

My sister and her husband live in Montana, both are 64 years old. He is on disability, sister works. He had a malignant brain tumor and stroke in Nov 2015, now has esophogeal cancer and blood clot in lung. Sister has been off work since Oct 2015 to care for her husband. She needs to return to work. She needs in home care for her husband while she is at work. They have a mortgage on their home and have no assets. She is the sole provider of the home other than his small disability compensation.