Stick to RPM based systems as dnf supports transactions. The ability to look at history of package installation and rollback to a known state solves most admin issues.
The value of LFS is not in having the system you build, it's in understanding it. After you've read and worked through the book, you've managed to produce a functioning GNU/Linux OS, and presumably you know what all the parts are.
From there, understanding any published distribution is a matter of understanding what makes it unique, maybe a different package manager or init system, or different userland packages. Regardless, the fundamentals still stand, and your ownership of the system is improved by having worked through the book.
There are many ways to do this without RPM too. I used versioned AppDirs. NixOS uses hashed directories names and nix for description of states that are guaranteed to work. No need to have to cater to RPM.