What would be the economy of these data centers if they would run using power source with say, for example 25% capacity factor? What is the capital expenditure of a data center? What is the yearly operational expenditure of a data center?

I found that a 100 MW datacenter can cost roughly $3.35 billion, with a significant portion going to high-end GPUs like the B100 or H100. For electricity, 100 MW data center can incur annual power costs ranging from $41 million to over $131 million, depending on regional energy prices.