LFS again

Ok, got through chapter 5 of the LFS book, but I really do want a package manager. I have looked at apt-get (which I LOVE in Ubuntu) RPM (No experience) LPM (Something designed specifically for LFS, although it doesn't look complete enough to be useful) and portage (the Gentoo package manager) I would like to install apt-get, but I'm not sure how feasible it would be to use on LFS. Ehh RPM and LPM, so I think that once I'm closer to finish (I'm just starting chapter 6) I will try portage, and XFCE. Me and my friend also think it would be cool to sell custom computers (meaning everything from the hardware to the OSes installed) over the summer to see how feasible it is. I think that would be cool.