Solar-thermal power plant works at night, but...

For a lousy potential 5 megawatts of output: ...it requires 30,000 square meters of special parabolic mirrors and 5,400 meters of high heat-resistant pipe to collect the sun's rays in the molten salts, even in Syracuse. All that adds up to a building cost of roughly $80 million for just 5 megawatts of electricity. I do believe that at some point in the future solar power will make sense, but this is just rubbish. Let me get this right, this plant prucing not really very much power is covering 30 square kilometres?!