[ehtd]

It is quite helpful. My approach would be to create a project that gradually adds one by one of the tools.

For example first get the gems installed and with that you could just add to the lane the increment build number.

Then install homebrew and xctool and add that tool to the lane.

In that way, you can start using fastlane gradually and not install all the dependencies at first. It is the approach I would take, but I know there could be many others for such a complex tool.