I have read what you wrote, that is why I was wondering how did "Rheinland and Liberty markets crash down" make it into your list of "random happenings that have no permanent effect in the storyline", or rather "things that will make your worlds shake for a day or a week tops". A market crash of two of five houses, one worn off in a recently ended war, the other is still engaged in one, is not something I would expect to have no effect at all after a week. I would expect such to shake the world so much the aftermath lasts for a few months at least. That is why I was interested about your concept of a "market crash".
It was an example dude. I like his idea, and the commodity buffs are a great start. Have weekly buff rotations combined with some admin triggered NPC events would be great to help change up the daily monotony