Every municipality of this state, in or near which a state university or other state-supported four-year college is now or hereafter may be located, in which there has been constructed or is contemplated, an airport for use by said university or college, as the case may be, may, in the discretion of its governing authorities, contribute funds and aid and assist by the donation of lands, furnishing of materials and labor, use of general municipal operating funds, or otherwise, in acquiring a site, erecting suitable buildings, and constructing, equipping, maintaining and operating an airport for use by the university or college, as the case may be, and for use by the general public in said municipality.