Spreadsheets are easy to start and hard to stop using. Every department adopts its own version, and within a year, no two spreadsheets agree.
The real cost isn't the software — it's the hours spent every month reconciling numbers that should have matched from the start. Managers spend more time gathering information than making decisions with it.
Before adding another tool, it's worth asking a simpler question: where does this information actually live today, and how many places does it have to be re-entered before someone can act on it?