In the case of Windurst, I had to go to the leader's headquarters, which is the Heaven Tower in Windurst walls, and there was a clerical office. I'm under the impression that the San Doria equivellent of this tree/tower hq is that D'Orangejuice Manor that I wasn't allowed into because I was Windurstian. As for WP prices, I had been told they were 1500, so I imagine that WP prices lower as one gains rank. I'm currently rank 2 if one needs a reference point.