I had 35k on x-mas, and all my crafters ready. Now, 2 months later, I'm at 310k liquid and a full, valuable 6 tab guild bank. If I spend about 4 hours crafting, trading and listing a day I rake in an average profit of 10k. If I spend only 1 hour this seems to drops to around 2-4k profit per day. For this I'm doing glyphs, gems, scrolls, vellums, bags, arctic fur, leg armors and spellthreads, runescrolls and drums, several smithed items, darkmoon trinkets, hogs and pets, and to a small degree some flipping of mats I buy and store anyway (abyss, eternals). Basically 4 different chars that batchpost their entire inventory.
A very typical scattershot approach I guess, the only thing that may be against the grain is that I do *not* use Auctioneer. I use auctionator + qa3 + market watcher + bulkmail2. I also do not use KTQ or Skillet, instead I use an addon I wrote myself to craft my glyphs, that only has dependencies to Altoholic (to know the numbers) and Bulkmail2 (to send them off while crafting at the mailbox so your inventory doesn't run out). For gemcrafting I use Auctionator's shopping lists to quickly select a certain gem, see an overview of gems sorted by buyout price, and marked if I have one of that type on AH already - then I manually craft some gems that I want to sell and qa3 will pick them up on the next post. Market watcher has a snatch list-lookalike that works very nicely but again needs you to set your values manually. So basically I do the market prices by head, have to set all thresholds and fallbacks manually, and I do nearly all of my posting with qa3. I totally agree this has several disadvantages, but it also keeps it simple. And no reloading your UI to switch between Auctioneer and qa3. Once an item is set up it requires very little user intervention to keep selling it forever - thanks to mods like MailOpener a lot of the time per day I listed is actually spent Alt-Tab'ed and browsing forums.
I'm not really shooting for the million, but at this rate at least half a mil shouldn't be too far off