Antriksh Nature's true value isn't just price

Noida Extension mein Antriksh Nature dekh raha hoon for my post-retirement life. Kids have moved out, don't need such a big place anymore. We're selling our large house and want something manageable, with good society and elevator access. My recent site visit to Antriksh Nature felt good, but I'm always skeptical about builder's listed carpet area vs. actual usable space. My tip is: always carry a measuring tape to see actual dimensions, not just trust the brochure. For ₹3.63 Cr, I want true value. What about maintenance charges? And proximity to good hospitals?