I am a Gentoo user and most of that is already a reality on Gentoo systems. Get the stage3 tarball set up, slap your /etc/portage/make.conf and /var/lib/portage/world files in there and build.

Obviously, depending on whether it should be a blank system with the same apps installed or a clone of a previous system, configuration in /etc and one’s home directory may need to be copied, too.