I think originally we decided that budgets didn't roll over from one year to the next, which makes sense if the budgets are set in line with the money we have in the bank account and making a decent yearly prediction of income/expenses, etc.
From what I've been reading, it sounds like finances aren't amazing, given all the potentially large upcoming expenses (licenses, electrics, blah, blah). If this is the case it would seem prudent to use some of the record budget if it's there and untouched, rather than doubling up the publishing budget.
Well fucking done for making the money back so quick! Has the first Golden Hour book brought back in all the money that was spent on it too? If that's the case, it might be worth seeing this as money as a loan rather than a cost and therefore earmarking more than the normal budget to be spent...