Lawyer likely will not help as it may have something to do with Medicaid/Medicare reimbursement laws created by the state. Also, as a nurse, it is impossible to work 24/7 on a continuous basis, who would your relief be, who would fill in for you when you are sick, need to go grocery shopping, leave the house for other errands, vacation, etc. Most cases like your friend although may require 24 hour care, may not require 24/7 nursing care.
How would you draw the line between your nursing obligations to care for him and when you are off duty? If the nursing company has not given you a nurse, consider switching companies.
Check with your state laws on non-family person who shares and address. If you were a family member it may be a different story.