During DMF week might I suggest you sell your scrolls of wisdom. On my server people were willing to buy your cooldown for 200g.
In response to the original question, 1) I wouldn't try to keep up with 55 professions. You're going to spend way too many materials getting their professions up and lets be honest you aren't going to keep up with using 55 cooldowns a day enough to make it worth it. Every non gathering profession costs thousands of gold to level, and you have to actually use that profession enough to break even to bother. If you have a "main team" I would try to have one of each thing except mining on that team so that you can make the best use of motes. No mining because your tank should be enchanting/tailoring and no one else wants icky mining anyway.
For other professions
I would probably suggest starting with 4 scribes, 4 alchemists, 3 jewelcrafters, 2 or 3 tailors, and then one of everything else. Level up a quick herbalism on anything that you want to do heroics on that isn't getting a crafted profession. The haste boost is decent and if you level each one trying to gather exactly the herbs for an alchemy guide it took about 4-6 hours pre-CRZ. Still not too bad now. Plan to buy the fucking goldthorn for 10g each rather than trying to gather it yourself, its ridiculously inefficient to gather last I checked and that was pre-CRZ. In an ideal world, btw, I think that every tank should have tailor + enchanting so that they can DE blues and benefit from scavenging. For inscription only level using appropriate level herbs once, for all subsequent toons just use the high level herbalist to convert the inks down (except the first tier).
Being Spreadsheet Girl (trademark pending) I actually have a table of where all of my professions are, basically a grid that goes like this
Classes along the side, and then one column for each account with
Name - Level
Prof1-ProfLevel
Prof2-ProfLevel
For each class.
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