Minimal Templates: (Including: How to use sudo/root, global Copy/Paste, Network, Audio, and other features are missing)  
https://www.qubes-os.org/doc/templates/minimal/

How to install software from source to dom0: (By compiling in another vm and move to dom0)  
https://www.qubes-os.org/doc/i3/#compilation-and-installation-from-source

Inheritance from templates:  
https://forum.qubes-os.org/t/usr-local-bin-not-copied-from-templatevms-to-templatebasedvms/2422  
https://www.qubes-os.org/doc/templates/#inheritance-and-persistence