Dreaming of a large manufactory, denotes unusual activity in business circles. See Factory.
Dream dictionary: Manufactory dream meanings
…If you dream of doing to a flouring-mill, where you see plenty of grain and flour, it is a good omen, as it shadows forth thrift, and abundance; but to imagine in your dream that you are in any manufactory of cloth fabrics called a mill, is a sign of poverty and want. Girls who work in such places should be careful never to dream of them. Lucky lottery dream numbers – 55….