So I have a Follow Up Question:
I'm trying to generate a kingdom with a city, a town, and a few villages/outposts. Basically what I did was made the Urban Settlements vassals to the overarching kingdom.
The Kingdom has 6 hexes civilized terrain, 3 hexes borderland terrain, 3 hexes wilderness terrain, with 1980 families in the civilized terrain, 360 families in the borderland terrain, and 60 families in wilderness terrain. The Land Revenue is 5 gp/family. Unless I did the math wrong, which is entirely possible, there are 2400 families in the Kingdom (not including urban centers), with a total Land Revenue of 12000 gp/mo, Service Revenue of 12000 gp/mo, and Tax Revenue of 7200 gp/mo (at 3 gp/family).
Are all of these revenues intended to be the flow of coin into the Regent's treasury? The rulebook only mentions coin flow under taxation. Using only tax revenue there is no way to pay for Garrisons, Stronghold upkeep, and Government Employees. Or does Land Revenue represent things like resources and trade goods, and services that are provided by the population?
Continuing the example, to make sure I got it right: I've only determined the city so far (so its being treated as Vassal Revenue: 1237 gp/month.) The population of the City is another 1100 families. (So the size of the major city is almost 50% of the population of the rest of the kingdom put together.) I need to also make up 2 villages and a town as vassal.
Continuing with the Kingdom: Garrison costs: 3960 gp (civilized) + 1080 gp (borderlands) + 240 gp (wilderness). Stronghold maintenance costs: 4500 gp for 90,000gp fortified palace, 3375gp for 67,500gp major fortification, 4500 gp for 90,000 in towers and outbuildings)
Kingdom Employee Costs: I finally calculated this out to about 2400 gp monthly.
Unless Land Revenue and Service Revenue are immediately spendable coin, this Kingdom is operating at a monthly deficit of 11,618 gp, not even counting the Festivals. The four seasonal festivals have a cost of 12000 gp each.
EDIT: I see my math problem. I'm calculating stronghold maintenance at 5% instead of 0.5%. This means the deficit is only 481 gp/month with another 4000 gp cost to save up for seasonal festivals.