Sec. 23. In determining the amount of bonds to be issued and sold, the board may include the costs of the following:
(1) Acquisition and construction of infrastructure.
(2) Financing charges, bond sale discount, reasonable issuance costs, and interest accruing on the bonds before and during the construction period and for a reasonable period of time after construction.
(3) Expenses such as legal fees and engineering fees.
(4) All other expenses necessary or incidental to accomplishing the purposes of the authority.