I dropped
3x 415+ leatherworkers
1x 450 Herbilist
Uh.. and something else? don't recall.

And its been worth every penny (copper?). Parachute cloaks + nitro boots = most fun in the game I've ever had

The teleporters / wormholes, rocket launchers, auctioneer access in dalaran, mote extractors x5, portable bank, repair bots, portable mailbox.... etc... thats just gravy.