The trustees of a district may not purchase and operate a school bus as defined in 20-10-101 (5)(a)(ii) until the trustees have:
(1) conducted an analysis of the costs associated with purchase and operation of the school bus compared to the costs associated with purchase or contract and operation of a school bus designed to carry more than 10 passengers; and
(2) adopted a written finding that the purchase and operation of a school bus as defined in 20-10-101 (5)(a)(ii) is the most cost-effective means of transporting eligible transportees on the bus route or routes to which the school bus will be assigned.