If a majority of the qualified voters in the election held for the establishment of a hospital shall also vote for the issuance of bonds in a designated sum recited in the petition calling for an election and in the notices of such election and stated on the ballots, for the purposes of purchasing the required real estate and constructing and equipping the hospital building or buildings, the city or town council may proceed to issue and sell municipal coupon bonds, in the name of the municipality, in a sum not exceeding that voted for in the election.