Section 14A. It shall be the duty of the regional school district planning board to study the fiscal and educational advisability of establishing a regional school district, its organization, operation and control, and of constructing, maintaining and operating a school or schools to serve the needs of such district; to estimate the construction and operating costs thereof; to assess the educational soundness of establishing such school or schools, to investigate the methods of financing such school or schools, and any other matters pertaining to the organization and operation of a regional school district; and to submit a report of its findings and recommendations to the selectmen of the several towns.