having installed Gentoo/Funtoo/et. al. each many hundreds of times, I've come to find that {Gentoo&ilk} are not really that difficult to get installed . . .
At least a FreeBSD installation is done within one hour, including initial configuration from scratch. Gentoo can't do that.
I've been meaning to do a series of deep-dives into raw BSD, but other things have held my captive.
Rule number one is: Forget everything you thought you'd know. (Granted, FreeBSD has grown quite GNU'ish these days, so... forget most things you thought you'd know. Still true for the other BSDs though.)