That’s ok. For just a few billion dollars I could build a (single) stealth windmill. Of course I’d also need many millions of dollars a year to guard it to keep the technology from falling into our adversary’s hands, and also a few six packs to pay the locals to shoot migrating songbirds so they don’t accidentally damage the stealth coating on the blades. Seems entirely reasonable in an effort to get a few thousand dollars per year worth of electricity, don’t you think?
Shhhhh...songbird blood IS the stealth coating!