[hider=Regarding the roleplay right now]
I would like to point out that unless it's a massive kingdom where everybody absolutely loves the King, having massive slave camps, a massive, well-trained, well-equiped army, and a giant castle with thousands of acres of farmland just to support a single city, where farmers would most likely be more similar to peasants in the medieval times rather than the poor citizens of later times, you wouldn't be able to support it. And with immigrants and the like, it'd be even harder to have a really large army. There will be people that won't know the language that well, and there will be people who are in it for the free food, the free drink, and the fame of being a soldier. 

Personally, I'd immediately start organizing a revolt against a King that had such things. A giant, towering castle is only as good as its foundations; the strain put on the lower sections of walls would probably give way easier than the 250-foot walls of the Curaw Castle. It doesn't matter about the architecture or even the magic; something that large will most certainly be able to easily topple. A wooden house may be stout and strong. Take that wooden house and add a dozen stories to it; its foundations will creak and moan, it will sway in the wind and if a single beam is cut, the entire building may simply collapse, whereas before, it would not fail at all.

You're a single person, with a city of what seems like tens of thousands, with hundreds of thousands of subjects. Your words are no use against so many people; a mob will simply drown you out, and kill your power. Or one can plug their ears, and again, no influence would befall them. And giant slave camps? Working slaves to the bone? Other Kingdoms would band together if Verset was an aggressive nation, and they'd destroy Verset as one. Again, my calvary would probably join them.

There are powerful kingdoms, and then there are powerful kingdoms that can be easily toppled. Yours is one that can be easily toppled, because more often than not, the baron or lord of a fief is who people are loyal to, not to the King exclusively. Especially if they know that the King has a massive army that he uses to wipe out and take entire kingdoms prisoner to work to the death.

There are faulty nations, and then there are nations that just go too far. There will be powerhungry mages, powerhungry soldiers, etc etc etc, and that means you don't hold all the cards. The King would think he has all the control, but all he does is gesturing, and everyone will go along with it. Other nations would not trade with them, and you'd have your lords' cheeks, though they'd never show it. You've just made a King that has no power. Rome was far less powerful, from what I can tell, and they collapsed.
[/hider]