More LA R'lyeh and spellcasting questions

[Corwin]

Edi said:
Void summons are free. Freespawn hybrids cost 9 or 11 gold per unit, hybrid troopers 14 and hybrid soldiers are more expensive. Mad priests, madmen otehr similar are 1 gold per unit, so every 15 cost 1 upkeep.

Hmmm, that's strange. Are you absolutely sure that all void summons are free? I am asking because I did several experiments back then when I was looking at that "free" R'leyh stuff really costs, and found out it actually costs upkeep. You are right about 1 gold per unit price for most "mad" troops.

But I could have swear that the "big black wave" void summons costed about 60gp each. Because on the turn when I got 3 of these things and nothing else, my upkeep jumped by 6gp. That means 2gp per unit, that means they should cost around 60gp each (since they are sacred). I only kept one provice for my experiments, so nothing could have spawned outside my capital.

I suppose there is a small possibility that somehow I've overlooked something during that turn. But are you sure about what you said about all void summons being free?