Kingdom Building 101
Rob's grasp on his fledgling kingdom is tenuous, at best.
Expansion is impossible thanks to an angry war-clan of goblins encroaching on the eastern border. Also, monsters and bandits run rampant within the valley threatening his subjects.
And since trade is nonexistent and supply lines are dead, the ramshackle village must be kick-started into an economically viable town - one that generates income for the meager royal treasury, instead of sapping it.
The responsibility for each of these problems are his alone whether he likes it or not.
But there's a larger concern which casts a dark cloud over everything.
His is not the only kingdom and neighboring rulers have started to view this janitor-turned-king as either an exploitable ally...
... or easy prey.