The municipality may authorize, issue and sell general obligation bonds, which shall mature within 30 years from the date of issue, to finance the acquisition and betterment of real and personal property needed to carry out the development program within the development district together with all relocation costs incidental thereto. Bonds issued under authority of this chapter shall be payable in annual payments which shall be so arranged that the amount of annual payment of principal and interest in any year on account of any bond shall not be less than the amount of principal and interest payable in any subsequent year by more than 5 percent of the principal of the entire bond. The total amount of such payments shall be sufficient to extinguish the entire bond on account of which they are made at maturity. The first payment of principal on any bond shall be made no later than 5 years and the last payment not later than 30 years after the date thereof. Each authorized issue of bonds shall be a separate loan. All dedicated tax increments received by the municipality pursuant to N.H. Rev. Stat. § 162-K:10 shall be pledged for the payment of these bonds and used to reduce or cancel the taxes otherwise required to be extended for that purpose, and the bonds shall not be included when computing the municipality’s net debt under RSA 33.