And there is characters who is doing so and not complaining what there is disadvantages as not added features as bank/warehouse.
Blaustein easy can be used as place to store any illegal things just as Vallaki's drain.
For characters from Ghastria there also can be use of warehouse especially with recent little tension between Dementlieu and Ghastria.
Muhar already have nice camels, what they also need?
And Har-Thelen in Sithicus visited not so rarely and as I know some characters prefer resides here. And something tells me what sithican elfs can provide such serivce for sithican elfs and for high amount of gold to other adventures