Jeff Atwood, of StackOverflow, thoughts on Pi-hole;
We simultaneously have a very real web obesity crisis, and a looming crackdown on ad blockers, seemingly the only viable weight loss program for websites. What's a poor web citizen to do? Well, there is one thing you can do to escape the need for browser-based adblockers, at least on your home network. Install and configure Pi-Hole.
Basically the same post as mine. I still believe that dietpi is the simplest way to go. And it is headless by design. You can just tuck the Pi somewhere behind your router.