Noah exhausted all his eloquence and tried his best to dissuade his adoptive mother from attempting the summoning of the Ancient Golden Dragon. It's not about the cost, but rather that it's simply unfeasible.
Even if it were summoned, Noah didn't want to even begin to calculate the resulting expenses.
Since there isn't a clear and specific enemy, until now it's unknown how many Legendary combatants were behind the explosion of the Dark Territory passage.
Summon the Ancient Golden Dragon, and then? How many times do you expect it to act?
Let alone the Augustus family with shallow resources, even the Aristoria United Kingdom might not be able to bear the burden.
As for favoring their kin by reducing the fee or anything similar, don't even think about it. The Dragon Clan is very distinct in this regard; even among siblings or parents, they won't miss a single copper coin of the due payment.
