The steps from section two should be utilized and repeated until you reach about 25,000 gold. Once you hit that mark, two more options become available to you, the neutral auction house and cross-realm transferring. The latter is the single most effective way of making gold, although much planning must be done prior to it. However, the smaller methods you used to hit 25,000 should still be done as regularly as before. Nobody got to the cap with only BoE epics, it takes time and patience!
8.1 unlocked a new level up state for epic champions that gives them 2 equipment slots, so I thought to reconsider which equipment should my BFA champions have in order to maximize gains. I saw a lot of negativity in other post about champion equipment ( IMO, the mission table has the best effort/reward ratio in the game, as in you just click things and some time later you get results.

When assigning a selling price, do not aim for too low a price that would give you too little profit, but certainly do not assign too high a price. Too much greed is never a good thing, and the AH is filled with items that do not sell due to excessive inflation. A very common tactic in the AH is to sell for lower than what another player is offering, and many players make a lot of money that way. Similarly, losing sales thanks to being undercut is never fun. Aim for as low a price you can that will still make you a good profit. If you can keep producing the same item over and over, sell cheaply yet make a good amount of the item, you will reliably make a lot of money by volume. Moving inventory is the best kind of inventory.
The recruit also grants the recruiter levels, with the latter gaining one level for every two levels the recruit gains. There are a lot of rules and restrictions to that, however. It all basically boils down to leveling alternate characters together. The recruiter can even earn epic mounts and battle pets if you stick with the game for a couple months.
Raw gold farms revolve around farming areas where the mobs drop a lot of gold and you also get items you can sell to vendors. The primary goal is to just generate pure gold. The most popular raw gold farm is to run all the Cataclysm raids at 25 heroic. This will net about 1.5-2.5k gold per raid, and a chance at some rare mounts. Raw gold farms are great if you don’t like interacting with the AH, dislike variance or you are in the process of building up your capital.

Quality gear. These can be greens, rares, whatever. However, always think, "Who needs this?" Items that have stats like Stamina are typically useful to all players. Items with stats like Spirit are only useful to a subset. Items that combine two highly sought-after stats, like Stamina and Intelligence (which all casters need) will sell for more than items that combine two stats like Agility and Spirit (which practically no class needs).

As you're leveling, I generally recommend you just follow the natural flow of the progression through each zone. They're laid out fairly reasonably. But don't be afraid to hop around, especially if you're near a quest objective. You shouldn't actually need ALL of the zones listed to reach 62. Pick the ones you like best. It's much more important to simply be as focused as possible and flow from one quest to the next.

Allied races are variants of existing races. The Void Elves are a version of Night Elves, while the Highmount Tauren are, you guessed it, a version of the Tauren. Four allied races are already in the game before launch and two more, the Dark Iron Dwarves and Mag’har Orcs, were added after Battle for Azeroth launched. Each Allied Race has its own racial abilities. You can also unlock a heritage armor set by leveling any Allied Race to the level cap.

Unless Blizzard has some real story shake-ups and a phenomenally tuned raid on the horizon, I’m honestly expecting the sharpest player decrease to set in within the next few months. The expansion itself has some interesting ideas, but sticking to a World Quest grindfest is quickly becoming the norm, and the Island Expeditions aren’t exactly exciting.
I personally wouldn't recommend Bloodmyst Isle. There's a ton of quests but a lot of those quests have absolutely horrible drop rates on their items. A lot of the quest mobs also have very slow and/or spread out spawns so if there's other people there you're gonna be waiting for respawns or spending a lot of time traveling between spawn areas quite a bit. Overall it's just an incredibly slow zone as far as EXP goes.

XP Potions: The Elixir of Rapid Mind and Elixir of Ancient Knowledge no longer drop. They can be bought on the AH still but are way to expensive for it to be worth it. The Excess Potion of Accelerated learning is available from your garrison quartermaster but only works for level 91 to 99. As of Patch 8.1 you can also buy the 10% XP Potion Draught of Ten Lands.
Some people have made arguments that quest blues can sometimes be more powerful than heirlooms, especially with sockets. I'm not convinced. The simple fact that you never have to even look at quest rewards will save a non-insignificant amount of time over the course of leveling. Also of consideration is the value of enchanted gear never having to be re-enchanted.
Sometimes you can make money by crafting items with ingredients supplied by other players who give you a tip to make the item. This is not necessarily a reliable source at low levels, but it can be a good supplemental income source at higher levels, particularly if you have good recipes. And if you can charge for the customer using your materials (as opposed to materials supplied by him/her), you can mark those up.

So gibblewilt is a special NPC. He is the only NPC that drops the Foremens Vest chestpiece.  Generaly this transmog is a bra-less vest – making it VERY popular in the transmog community (I play on moonguard, and are highly invested in the transmog community, so I know).  Anyway, even though the drop chance is hell on high water – snagging one can yield you profits of 50,000g or more. Whats better is usually noone can be found farming him, so you can camp an alliance character nearby, and kill him ever-so-often.  Hes located just outside gnomergan.

First of all, the value of transmog is decided by rarity and how they look. Some items like Minenarbeithut der Tiefen or Pendel der Verdammnis (they can drop in Uldaman) are worth millions of gold. They are worth so much, because they have a really small chance to drop. Other items are bought well because they look good. Best example in this case is the Glorious set, its legplates Glorreichen Beinplatte reach a 100.000 Gold value easily.