Whenever a petition is presented to said township officers signed by one-third of the electors of said township requesting them to submit the question to a vote as to whether or not there shall be erected or purchased in said township township buildings, in accordance with the provisions of this act, it shall be the duty of said township officers to call an election for said purpose and submit such proposition at the next general election, or at a special election if a general election will not occur within six months of the date of the presentation of the petition to said township officers, and give thirty days’ notice thereof by posting five written or printed notices in as many public places thereof in said township, or, if the board deems it advisable, by publication in some paper in general circulation in said township. If a majority of the votes cast be in favor of the erection or purchase of township buildings, then it shall be the duty of said township officers to at once procure the land and cause said buildings to be erected, or to purchase said building as the case may be, at a cost not to exceed the amount specified in the call for said township election, and in the manner and under the restrictions that in the judgment of said board will procure the best buildings for the money expended.