This ONLY calculates how long it will take a kingdom’s level to pay for itself in gold.
For example, if you spend 8000 Gold to level a Kingdom, how many days until you see that 8000 gold paid back from tribute?
This does not include Home Kingdom or kingdom stars, nor does it assign any value to bonuses for Skills, souls, or glory.
Like I said, it’s very rudimentary.
It would be my great hope that someone else can find a use for it and make it better.
Maybe someone involved with this: