When doing a FME Flow Fault Tolerant installation you need to configure multiple environment, but they pretty much have all the same configuration steps, something that would be useful would be to export the configuration at the end. It would be similar to a parameter file that you could use for a Silent Install.
And when you jump on the other machine that you are installing FME Flow, you could provide the configuration file at the start in the installer, you just have to do the change for the machine name.