This is also correct, since the difference between Turmoil 3 and Order 3 is 42%. You do also have to apply a gold attribute to gems (say 10g per gem, for the sake of arguement) and account for the cost of free troops.
This doesn't even account for the fact that out of 30 Events with 10 Provinces you will more than likely have 10-15% Bad (depending on ... luck
Also don't forget National Heroes.
Even with all of that, I'd probably say that Luck 3, Turmoil 3 is about 25% worse than Order 3, Misfortune 3. Since even if bad events do a number on you, it won't impact the total gold bonus.