As much as possible, the activities of the board shall be supported by the public, voluntary contributions, fees and charges, and payments from the State and federal government. To maintain an adequate level of medical and nursing care for aged, convalescent, and chronically ill individuals, the county commissioners or county council of a county may: make annual appropriations to support the operations of the board; and make appropriations or borrow funds for land acquisition and capital improvements and issue bonds, notes, or other evidence of indebtedness.