Ditto. I install almost everything via brew and brew cask, and store the list of packages in git. It makes setting up a new machine a breeze. Thanks for all your hard work!
If you want to go a step further there's also Strap which will bootstrap your macOS system with some sensible defaults and install Homebrew, your dotfiles and your Brewfile:
https://github.com/mikemcquaid/strap
I've been looking like this for quite a while. I'm still looking through it all, but I don't suppose you have a solution for setting System Preferences, particularly Trackpad settings and remapping the Caps Lock key to Ctrl?