For those that are hunting (and I looked at the incoming search results on the blog - there are a lot of you), according to WoWhead the mists of pandaria bag size will be a 28 slot Royal satchel (tailors to make) and a 24 slot Gummelpack (possibly quest). I have not seen any evidence yet of new profession bags.
There are two recipees to make advanced cloth: one on a daily cooldown and uses 8 bolts of normal cloth; The second requires 5 bolts and the 3 of the new 'time gating' item Spirit of Harmony.
Until demand settles down (probably 3-4 months in); you will want to make your special cloth daily; there will be something to use it for.
For the mega-rich who needs crafted product NOW you will need to find a tailor comfortable with farming
When live hits check if your advanced cloth (Imperial silk) is soulbound. If so, then you will be making product for a while to come (if in doubt - check the spellthread prices). If not; then every tailor will be crafting them long after they are profitable to make.
There will again be 3 spellthreads; Basic/cheap; expensive; and tailor only. From my view, there is surprisingly little demand for basic spellthreads; as most players seem to only want 'best' or 'nothing'. While there will be anemic demand for basic spellthreads; there will be a much higher demand for the expensive ones.
Assuming that LFD/LFR is again gated on gear level; PVP gear will be demanded by newly dinged players. Of course you will level tailoring mostly on the back of PVP gear, so supply will be higher.
For all crafters looking at profitable crafting; you either want to be out in front; or slightly behind the other crafters.
If you are in front (realm first or similar); and can get a supply of Spirit of Harmony; you will be able to demand a premium for starter raiding gear.
If you merely are meh - I will level cloth when I get to it; using the same levelling guide that everyone else uses; you will still pay a fortune; but won't be able to sell stuff.
I have always looked at the cost per point of crafting; taking a bit longer but doing so much much cheaper; and having stuff to sell later. If you are looking to level on the cheap; there are always options. Look at that recipee that gives a chance of a level but no one else is selling on the AH.
Finally; you will have useless
Finally; for week 1-3; either
- Already be very rich; and strive to be among the realm firsts now (or not be far behind them); OR
- sell it now and buy it back for 1/2 price next month instead.