The VA is a goldmine of undiscovered money to take care of someone who needs help and has low assets. The program is commonly called "Aid and Attendance". It is available to a vet or his surviving spouse. If one or both of your parents served in the military during wartime, even if they never left the states, they can receive up to $1949 per month, tax free. If both are vets they could receive up to $2540 per month. Go see your county Veteran's office or a Veteran's Service Organization, such as Veterans of Foreign Wars or American Legion. They can assist with the planning and application for Aid and Attendance.
The prior contributor is correct that the VA will pay benefits, but usually a written care contract is required. You may also be required to establish medical necessity, but that can be done through their physician. You should also check with your State's Medicaid agency. Some Medicaid agencies will allow a family member to provide services for compensation under a Money-follows-the-person program, while others do not.
You should speak with an Elder Law Attorney near you.