The mayor of a municipality that has a facility or land described by Section 1508.001 shall establish and maintain a complete system of records that:
(1) show each free service provided in connection with the facility or land and the value of the service; and
(2) show separately the amounts spent and amounts set aside for operation, salaries, labor, materials, repairs, maintenance, depreciation, replacements, extensions, interest, and the creation of a sinking fund to pay the bonds or debt.