How can I update multiple systems to Sierra from one download

How can I update multiple systems to Sierra from one download? I have a late 2012 Mac-mini running El Capitan plus a mid-2010 Mac-mini and a mid-2010 MacBook Pro both running Yosemite with restricted bandwidth on my internet connection and would like to upgrade all three systems from just one download. Is the process that applied with Yosemite and El Capitan (ie. copy the installer to another location before running it on the download system) still the way to go? Thanks.