I too used the Live CD.
I would recomend following the book to the letter for your first run.
One little unintentional screw up and it's over.
You're back to page one.
And I quote from the book LFS 6.1
Code:
4.3. Adding the LFS User
When logged in as user root, making a single mistake can damage or destroy a system. Therefore, we
recommend building the packages in this chapter as an unprivileged user. You could use your own user name,
but to make it easier to set up a clean working environment, create a new user called lfs as a member of a new
group (also named lfs) and use this user during the installation process.
The main reason is that you will be soon setting up a special enviornment to build the temporary system before building the final LFS system. If you don't, you run the risk that your host system's enviornment may contaminate you're build enviornment or just screw something up that you may not know how to fix.
It's not worth being lazy from the start. Take no short cuts or live to regret it.
Tip.
The best thing that you can do is not to read as you go.
Read ahead.
Read a chapter till you understand it and have no more questions.
Then go.
Make a plan. Read the entire chapter 5 before starting it. Understand and flag which build locations you can delete and when. If in doubt stop and read again.
Good Luck!