Stronghold PVP training quest does not scale a character to 70. There are combats that are required to finish, and it is basically impossible to do so once the enemy's arrow towers start killing you in 1 or 2 shots. No way to exit said instance when one cannot complete the quest. Funtimes.
My guild isn't even big enough to build the level 1 buildings. You would think that the first level, to get your stronghold up and running, would be cheap. Wow it is expensive.