You got my vote...if you buy it
Great idea, You could also use it to sabotage relations, kinda like sow dissent, or maybe increase the mtth of bad events of some kind of other. Lots of potential here.
bought castellans can give negative modifiers for when they oversee provices, or masters-at-arms could actually weaken the reinforce rate, maesters could educate children poorly, etc.
its a lot of work though.