The bonds issued by the local public trust, working in conjunction with the Department of Veterans Affairs, acting by and through the Oklahoma Veterans Commission, shall be payable from the following:
1. Fees, charges and payments, including any federal subsidies, grants or contributions, received in respect to providing health care to veteran patients at such facilities acquired, constructed and equipped with the proceeds of said bonds;
2. Appropriations made in any fiscal year to the Department of Veterans Affairs for defraying costs associated with said facilities; and 3. Any other legally available source.