Challenge: How much annual maintenance cost do you estimate for 10GW data center deployed in US?

Recent reports say NVIDIA is in talks to support financing for OpenAI’s proposed 10 GW AI data center in Ohio, a project estimated to cost over $500 billion. Based on my estimates, running infrastructure of this size could cost around $25–55+ billion per year. The biggest costs would likely be hardware replacement ($15–40B/year) and electricity ($5–9B/year), followed by maintenance, staffing, cooling, networking, insurance, and other operating expenses. For comparison, OpenAI’s reported annualiz