Alchemists can do a daily transmute with the most popular being
Transmutations: Finally we come to the biggest knight gold maker that requires the least amount of effort. Alchemists and Tailors can make special items that sell for bucket loads of cash.
Alchemists can do a daily transmute with the most popular being the Cardinal Ruby which takes about 40 to 70 gold in materials and turns it into a 140-190 gold gem. That’s over 100 gold worth of profit per day!
That’s even before we talk about Transmutation Mastery which could allow you to proc and create up to 5 gems a day. That’s a ton of free cash.
Tailors can make Ebon-weave, Moon-shroud, and Spell-weave without a cool-down now. You can take a small bit of materials (Eternal Elements, Imbued Frost-weave) and turn it into cloth that sells for over 100 gold each.
Mastery into one type of cloth allows you to make two pieces of cloth instead of one, doubling your profits. Especially useful if cloth is holding high on your server but the mats aren't.
If you want better margins then there is Inscription. You have to be a bit more dedicated though because there is a lot of competition on most servers.
General speaking, you are not only get gold from these techniques, but your WoW experience to complete your wow power leveling.