Once you have your finished product and have a price for it, keep in mind that using either your faction AH or the neutral AH also costs money: if the item does not sell, its deposit is taken by the AH; if it does sell, the deposit is returned, but a cut from the payment it taken by the AH as a commission. You must factor this into your selling price: your faction's AH will take 5% from your sale, while the neutral ones will take 15%. You can factor this into your cost to determine the minimum price at which you need to sell to at least break even:
Learned this today: posted a comment, came back later to see if there was any feedback, reloaded the page: the page posted a copy of my comment. That was not what I wanted. I just wanted to check if my comment was posted and if there were some responses. I did not want to post a copy of my comment from 5 hours ago. And, a humble guess, I think the majority of the users are not expecting such behavior either.
A zygor guide is absolutely not a reliable investment, it's not going to be resaleable so you're never going to make your money back. As a purchase, at this point in the game if you need a leveling guide you shouldn't be playing the game. Leveling up is so fast, quests are easy to understand and chained, and the game puts a mark on your map for where to go for around 90% of quests. If you can't manage to follow in-game quests (possibly with a free add-on), what do you plan to do when you're done leveling? Raiding and PVPing don't just happen for you automatically.
Each of those modes existed long before this latest expansion; raiding is a basic concept in MMOs, and Mythic+ was added in World of Warcraft’s last expansion. The problems with Battle for Azeroth’s endgame come from the systems it adds, which most often artificially gate progress where most of the fun can be found. If raids and Mythic+ are the carrot, we’re about to talk about the stick.
":" - Any time a step ends in a ":" instead of a "." means that the next step is part of the current step you are on. This generally means the next step should be done while working on the current step. This means every "start working on" or "continue working on" will end in a ":". But this is used with other occasions as well, so keep this in mind.
Guilds are perhaps one the most effective ways of progressing your character, and in turn, making money. Most 'high-end' guilds have a guild bank where members donate items for other members. This may range from potions, reagents, and craftable plans. Usually you will have to donate to a guild bank in order to receive items as well as stay active in your guild, but receiving potions that will aid your progression and craftable plans allowing you to profit off selling the products will benefit you in the long run. Also, donating to your guild bank may mean donating something you cannot use in turn receiving something you can use. Sometimes, additional services such as VoIP servers are provided and play a key role especially in end-game content; communication is paramount to a the success of an efficient group. Efficiency results in receiving gear faster, running more frequently in a shorter amount of time, and in turn making more money from runs. In a well put together guild, members become a close knit community including financial and questing support, which are among the most profitable benefits. If you have not considered joining a guild as part of your strategy moving through the game, you may wish to strongly reconsider.