The amount in the annual estimate shall be sufficient to raise a sum of money which shall be sufficient to pay all of the following:
(a)
The incidental expenses of the district.
(b)
The costs of the work of spreading and sinking waters which the board deems advisable to be done during the ensuing fiscal year.
(c)
The estimated costs of repairs to and maintenance of any property or works of the district.
(d)
The amount of any indebtedness (other than bonded debt) of the district currently due or to become due in the ensuing fiscal year.
(e)
The amount deemed necessary by the board for reserve funds to meet the costs and expenses of the district during the first six months of the following fiscal year.
(f)
The estimated amount necessary for the payment of the costs of any action or proceeding which may be taken by the district, including the cost of employment of attorneys and engineers.