How much does it cost to build a DAO?

I'm curious about the financial aspect of creating a DAO. Could you elaborate on the typical cost associated with building one? Do these expenses vary significantly depending on factors such as the complexity of the DAO's structure or the level of customization required? Additionally, are there any ongoing costs that need to be considered after the initial setup phase? Understanding these costs would be invaluable for anyone looking to embark on a DAO project.