I like the concept, I don't like the presentation or the reasoning.

But this idea or ones much like it have been presented before...

"Hassle-free diskless Virtual Machines with Xen and Alpine Linux"

https://jonnytyers.wordpress.com/2016/08/16/hassle-free-disk...

"How to make a Diskless Virtual Machine (KVM)"

https://github.com/lispydev/diskless-kvm

And if you just want a dead easy PXE server for bare metal...

https://www.iventoy.com/en/index.html