In acquiring or constructing any building under the provisions of sections 49.520 to 49.580 the governing body of the county may provide by ordinance or order any provisions or stipulations for the administration of the buildings and the income to be derived therefrom, for the security of the bondholders, as the governing body of the county deems necessary. The bonds shall be obligations only of the county, payable solely from the revenues of the buildings, as provided in sections 49.520 to 49.580, and in no event shall they be considered a debt for which the full faith and credit or taxing power of the county is pledged. Any ordinance passed or order issued under sections 49.520 to 49.580 shall constitute a contract between the county and the holder of any bond, which contract may be enforced in the manner and form as herein provided.