My Pre-Raiding Wrath Plan

I don't intend on raiding straight-out-of-the-Wrath-gate. Racing to 80 doesn't appeal to me, I'm still not certain which character I should focus my efforts on, and my goal is just to kill Arthas, not be the *first* person to do so :P

But this doesn't mean I'm not already thinking about it. As my prior post discussed, my first focus is to ensure the gold flows freely throughout Wrath. I'm going to do this through having access to a wide variety of professions, fortunately I'll have almost 3 70s by the time TBC is over. While some professions are great for making money, others offer wonderful BoP options, and since I'm greedy I need access to both. This means I need to come up with a fourth character to make the logistics work. How will I do this?

The plan hinges around the "free" level 55 Death Knights we're all getting in Wrath. Currently I have 3 characters who I can easily get to 80. My mage (herbalism/tailoring), druid (skinning/LW), and rogue (JC/mining). But with the DK, I see that as 2 free profession slots, so I'm going to use my DK as a profession bot and level it up to the minimum level needed for the profitable crafting recipes. So my plan is to...

1) Purchase epic mounts for my mage and rogue, as they have the main "gathering" professions. The mage already has one, the rogue will at either 70 or 77.
2) I've been researching the mats needed to powerlevel Alchemy and Inscription to 350 (the min. Wrath profession skills start at 350). I already have all the mats for Alchemy and about half of the Inscription ones. My Deathknight (leaning towards the name "Cashbringer") will take Alchemy and Inscription since their BoP offerings don't seem as amazing as some other options. Plus it'd mean re-leveling certain professions I'm just not interested in doing.
3) When Wrath hits, I'm going to level all 4 chars simultaneously, including the DK, taking as much advantage of rest experience as I can.
4) Then get all the professions leveled up to whatever "profitability" level is needed.
5) Once this is done I'll have a tremendous "money train" I can establish:

--> buy/farm ore --> prospect it into gems --> then cut/transmute metas --> AH
--> buy/farm herbs --> mill it for ink/pomace (or make pots and AH) --> then make glyphs/enchanter scrolls --> AH
--> buy/farm leather --> turn into drums --> AH

Last, I might turn my druid into a LW/Enchanter (esp. if I end up healing as a main), in which case I can be mostly self-sufficient for Gems, Glyphs, and Enchants, saving more money. The best part of all this is, once the market decides what's most profitable, I could even buy the raw mats, convert them, and flip them without having to do any farming at all. The next closest thing to free money, and freeing up most of my schedule for what I really care about ... raiding.