How much to build a DeX?

I'm curious about the costs involved in building a decentralized exchange, or DeX. Could you provide a general overview of what factors contribute to the total cost, and if there are any ballpark figures or estimates I could use as a starting point? I understand that the final cost will depend on various aspects such as the complexity of the platform, the development team's expertise, and the desired features, but I'm just looking for a high-level understanding of what to expect. Thanks in advance for your insights!