Undead also differ in the other factions because they need to use their simplest combat unit -- Ghouls -- to gather lumber. The TBC Classic Gold trade-off is that Ghouls gather 20 lumber per delivery instead of the Individual and Orc's 10, along with the Night Elves' 5. They are also a lot more defensible, should your competitor target your employees.
Night Elf or Undead players may find their beginning mine prepared to use, will not need to be worried about Haunting or Entangling right away, before,the first Gold Mine collapses. That is right, Gold Mines do not last forever, so you'll be seeking to expand quickly into the ancient mid-game. Find another gold mine early, and begin planning to clean the region and expand to a second foundation. You also need to keep an eye for your opponent's expansions. If you have two gold mines, and they have only got cheap WOW Burning Crusade Classic Gold one, you are going to be in a serious advantage.