Sorry mate but you're doing it wrong.
Get jewelcrafting and enchanting on another toon. With inscription make shoulder enchants and sell on the AH. Save some ore to make living steel, the other should go to jewelcrafting to make rings/necklaces which you disenchant while sending all the orange, purple and green to the alchemist to transmute and then make to Primal Diamond. What do you sell?
Shoulders, living steel, raw gems, enchanting materials, primal diamonds
This is the secret, it cant be compared to another formule to gain gold, with that you will gain ALL gold that you want, just you need
1- Toon Herbalism & mining
2- Toon Enchanting & Jewelcrafting
3- Toon Inscription & Skinning
If you have that, you have all solved, of course you can add later the rest, like buddys say you, but with that for begin you can make more than 20k day,
Possitive about other forms of gain gold: Quickly and huge amount
Negattive about other forms of gain gold: Configure fine randombuddy and all plugins to have less risks, because this form its not secure... If you wanna make it really good without think anything, you will need too a nice shuffle profile, but for now with HB changes, its kinda hard find a good and updated profile for that.
My personal advice, for every 2 hours of botting on your main account, include one hour of hand play, this make hard track you, always use all security plugins like logmeout, randombuddy, whispers etc. but for me the most important its include the hand play, I never get banned on my account thanks for this. (oh and be smart, if you need quick gold, dont go to ah and post 50000000 stacks because the players that use ah all days will report you for sure, instant ban, be smart and post less amounts, use alters, just make your formule, but like I say -> Be smart)
PS: If you?re raiding orgrimmar, level too leatherworking, you can make the recipe of pants/belt ilevel 553, sold average 50k (on my server at least.) its a nice inyection for your economy, but you take some days/weeks on take the mats.