To accomplish its purposes, the commission may borrow and issue and sell evidences of indebtedness in an amount or amounts as the commission may determine, but not in excess of legislative authorization, plus costs of issuance, financing, interest during construction, and any evidences of indebtedness funded reserve funds required by agreements with or for the benefit of holders of evidences of indebtedness for the purpose of acquiring, constructing, completing, or remodeling, maintaining, or equipping any project or projects. The commission may refund and refinance the evidences of indebtedness from time to time as often as it is advantageous and in the public interest to do so and may pledge any and all income of the commission, and any revenues derived by the commission or the state from a project or any combination thereof, to secure payment or redemption of the evidences of indebtedness.