To set up a training site for demo purposes use cloudaccess.net free for the first 30 days and then you need to renew.
use the /templateDetails.xml in the Helix template to rename the modules so they are easier to find or add new module positions.
SPPagebuilder is worth purchasing to use in conjunction with the Helix Template.
Install Blank Component to assign a blank page to a menu link for training purposes only.