The author's grasp of money is so wildly out of touch lol.
For reference, by the time of the French revolution, one gold coin (or Louis d'or) was worth 24 french pounds (and later 20 francs). A yearly salary (we're talking minimum wage) would be around 300-400 francs a year, or 15-20 gold coins a year.
France entire budget of the time was in the hundred of millions of french pounds (so in the tens of millions of gold coins), and that's the budget for the entire country.
300 billion gold coins would be well over 3000 years of France's annual budget, all just to make a single theater plus stage a play. That is ridiculously expensive.
And I know this world's gold coins are not gonna be identical in value and purchasing power to Revolutionary France gold coins, but it's still such a huge disparity it just becomes hilariously out of touch.