(a) The cost of any improvement project or services, including interest during construction and costs of issuance of bonds, may be paid from general or available funds, assessments, or the proceeds of bonds payable from taxes, revenues, assessments, impact fees, grants, gifts, contracts, leases, or any combination of those funds.
(b) During the progress of an improvement project or services, the board may issue temporary notes to pay the costs of the improvement project or services and issue bonds on completion.
(c) The costs of more than one improvement project or service may be paid from a single issue and sale of bonds without other consolidation proceedings before the bond issue.