First of all, guides on how to make Gold have a general problem - if they become popular then more people try to use the tricks which are written down in them, thus the tricks become invalid.
A small example:
If Guide X proposes to farm fire elementals on the elemental plateau because the drop rate is good there....and now hundreds and thousands of players read that and go there.....then the advise is useless because the place is overcamped and no Gold can be made there.
There are many ways to make Gold fast in WoW, but many of them only work when they are kind of "secret" - if too many people know about it then it doesnt work anymore.
But to your specific problem:
Its very easy to make the needed 5k Gold for an epic mount as lvl70 Warlock, you really dont need any guide for that. Some simple rules to follow:
1) Do the daily quests Ogrila/Skyguard/Cooking. Takes you 1-1.5 hour per day depending on your focus and will give you 100G.
2) If you didnt do all quests in The Burning Crusade yet then do it - as you are 70 already they will give you extra Gold instead of XP. So most quests in netherstorm and Shadowmoon will give you around 20G.
3) Work the AH if you have fun with that. There is no need to be a marketing expert to make money there.
4) Look at your professions, si there any money in them? Do you have a gathering skill? Do you use it with focus, do you use the Gatherer-addon?
Lets look at an example on how long you will need to get the needed 2500G if you play for 4 hours on 5 day per week:
Each week 5* daily quests = 500G (1.5 hour per day)
Each week 5*2 hour per day questing old quests = 500G
Each week 5*0.5 hour per day looking in AH - 200G
In addition during questing you will gather about 10 stacks of Adamantite if you are Miner and additional primals - as an example = 300G
So per week you make 1500 G.
In total you will have your epic flyer in 2 weeks.
Note that there are also many "secret" ways of making money, some very original and funny, others just require some repetitive work. But those will only work as long as you are the only one doing them and its not very usefull to post it here.
Good luck
