@Nunally
It's always good to see Spice & Wolf referenced 😄 Indeed, more people should check that master piece if only to know how a realistic Medieval society and economy would look like. Too many fantasy stories assume that feudal lords can go on power trips whenever they want.
Solum's livelihood is already being strangled by some merchants hoarding wheat. Assassinating one because you didn't like their attitude or their conditions (after
you invited
them to negotiate) would be the fastest way to burn every bridge with every merchant, including the sympathetic ones. Not to mention that their conditions (abusive prices, support for a candidate whose policies you don't like) are not precisely unheard of in our own world either.