It would be neat if the amount of specialist disciple's of the hand affected what you can buy at the vendor in your specific housing ward. For example, if a housing ward had 50 armorer, and 50 blacksmith specialists then the vendor would sell NQ high mythrite nuggets for 80k each and is available to both residence and to visitors. You can even implement a residence bonus for people who live/own a house in the ward. Using the same example above, in addition to the NQ high mythrite nuggets you will also get NQ high mythrite ingots for 120k that is exclusive to residents only.

For those familiar with a game called white knight chronicles on the PS3, this is exactly where I got the idea from. The georama town building in that game is essentially what I had in mind.