I started PowerForCPAP as a test: could a hyper-specific site about keeping medical devices running during outages beat the generic 'best portable power station' content? The answer, so far, is yes — but only because I went deep. Instead of writing 'Top 10 Power Stations,' I built comparison tables for specific CPAP models (ResMed AirSense 10, Philips DreamStation) paired with specific battery packs (Jackery Explorer 240, EcoFlow River 2). I also created a static wattage calculator (no backend, just JavaScript) and a page on FAA battery size rules for travel. The key insight: medical device users search for exact compatibility, not general advice. That intent drives higher click-through rates on affiliate links and, I suspect, better AdSense RPM. The site has 25 guides so far, all manually researched. No AI bulk generation. If you're testing a niche site, pick a problem that forces you to answer specific, high-intent questions — not just 'best X.'