I almost did it in 2008ish. Back then my country had a severe electricity crises, and in the summer we would get alternately one hour of electricity and one hour of blackout.

So I had to try and break the LFS build into one hour chunks. Though I got through quite a bit, unfortunately, there were some multihour build steps and I never got lucky enough with multihour electricity, till I finally lost interest.

I did learn quite a bit from reading the manual though.