What does a Starship cost?

I'm curious, what is the approximate cost of a Starship? We often hear about the vast expanse of space and the potential for interstellar travel, but I'm wondering if such ambitious projects come with a hefty price tag. Is the cost of building and operating a Starship comparable to that of a modern-day aircraft carrier or perhaps even more? What factors contribute to this cost, and are there any cost-saving measures being considered in the design and development process?