So I've noticed that a lot of you top tier guilds are able to come up with tons of flasks and various other expensive potions at the drop of a hat. Does your guild bank finance this or do all your players farm for their own stuff individually? If it's the former, what are some major sources of your bank's income?

Thanks in advance for any information/tips you're able to provide.

You can also offer to sell MC BoP epics to folks by bringing them along to your MC clears.

Most of our income comes from selling MC BoE gear, which is still rather profitable on my server. I don't know how this would work out on a more established server though.
We also sell Nexus Shards once we've gathered too many of them, which is easy during a normal MC/BWL run now.
Apart from that we also feed the guildbank with spare coins/books/etc. from ZG/AQ20, which also seems to sell well to some degree.
The majority of our potions are gathered by ourself though. Some people fishes, others gather herbs.

We've pondered about letting people join Onyxia/MC/BWL runs for money though, but it just seems like more hassle than it's worth.
Maybe someone else got experience with this?

Is there a trick to clearing all of MC in 2 hours? My guild (who is fairly well geared from BWL, and been doing MC for a very long time now) can't get it under around 4 hours. Is there some tricks we're missing? Or is it just that we need to do double the raid DPS to get it down to 2?

If you're "fairly well-geared from BWL" 4 hours is pretty slow. I'd say 3hr is typical with BWL gear, approaching 2hr as you start to really be fully BWL/AQ-geared, with the potential to go lower if you really rush.

Basically, are you ever not killing something? If so, you're wasting time. But you can find a ton of posts on this topic if you search a few months back on these boards -- it comes up from time to time, and we have our resident expert from the Axemen onhand to assist. :)

I'm assuming this includes...

Nexus Crystals
Gold from bosses
Sulfuron Ingots
Dark Iron Ore

What else?

Yea, we basically always have something in camp dying. I would guess that it's a case of many people going afk between bosses to watch tv or something. I'll take a look for old posts - thanks!

Er, ~15 Cores and 4-5 BoEs. We don't sell ore or Nexus crystals, and gold from bosses and other stuff like that goes to the guild bank.

Damn, cores must go for a lot on your server >.<

160ish each. 160 * 15 = 2400

5 BoEs probably average 700 each (some go for 500ish, desired ones like Might go for 1k+)

That's 6k right there.

Plus there's Dreamscales, Elementium Ore, and, yes, Sulfuron Ingots.

Our guild bank used to be pitiful ... when 12p disbanded and I saw that they had a 35k guild bank at the time, I decided to make ours less pitiful. It took about 3-4 weeks to reach that goal.

No. That'd be unwieldy as hell considering it gets split when you loot it. It just goes into individual pockets to cover repair costs and such; in the case of AQ gold, it pays for the cost of the fight down to Silithus.