Ferrer Maillol can give rough guesses for various quantities, and does.
By far the largest expense on Project Lawful so far would've been Raise Dead on the Security killed in the Nidal assault, at 5000gp per Raise. But that doesn't actually get paid by Project Lawful, it gets paid by the part of the government that Raises people.
De facto, the largest recurring expense on Project Lawful is by far the senior wizards making up Security on the new fortress home, which has significantly more Security than before. They'll run around 500gp/week apiece, and while it's not considered good practice for anyone including Maillol to know exactly how many Security there are, there'd be more than six and less than thirty. That doesn't get paid out of Project Lawful's budget proper, it's a military expenditure by the branch of the military that got authorized by Governance to post Security here; after taking into account considerations that included a request, and payment, by Broom's god, for there to be better protection here.
The actual Project Lawful, be it clear, has not yet at this point been assigned that kind of money flow. In part, because Maillol hasn't requested that kind of money flow apart from particular expenses, because it would have weakened his negotiating and political combat position in trying to keep lines of Governance above relatively simple and clear and prevent anybody else from swallowing Project Lawful; which, to be clear, the Queen could prevent, if it came to that, but only by expending her own political capital, which wouldn't be a good career move for Maillol himself unless there was a reason.
Things are now a bit clearer, but not to the point that somebody from dath ilan should get their hopes up.