This will be a synthesis of three things:
- Making a homebrew formula that will dump the Applications you care about into the homebrew location. This will require some ruby knowledge and a short read of the homebrew wiki.
- Making a script to copy/shove/move the files from the homebrew location to /Applications or ~/Applications or an alternate destination with administrator permissions
- Learning enough about git to grab the tools. You likely won't be able to merge your "formula" with the homebrew repository since it's against their policy to re-distribute software you don't possess the permission (rights) for software code publication.
If you want to do this as a learning exercise, have a great time learning. There are far better tools to package OS X binaries like Package Maker, JAMF's Composer, or Iceberg.
If you were uncertain if homebrew was your best option, I'd start with Iceberg and a tutorial like this to handle the permissions.