So, in my third gold making series on youtube, I ventured into HoL. I've tried out every instance in wotlk and see if there's any great gold making spots and boom, I found HoL Normal mode where I earned 1300 gold in 23 minutes, which will give you around 3k + each hour. Book of Glyph Mastery in the main item you're farming after. I got 4 books in 1 run once, and that made around 2k gold.
I hope you enjoy my third video. Keep tuning in on my youtube page to see new, easy gold making guides.
How to make gold in World of Warcraft #3 - Halls of Lightning - YouTube
Cheers.