Selling our big home, eyeing Sattva Lake Ridge

Upcoming projects often hide the real living costs. We're looking at Sattva Lake Ridge in Hyderabad, kids have moved out, so don't need such a big place anymore. My existing house ki resale ho jayegi tab tak. I'm worried about the actual livability and society vibe there. Brochure mein toh sab achha dikhta hai, par daily life mein kaisa hoga for seniors? Proximity to good hospitals like Apollo or Continental kitna important hai, koi bata sakta hai? Also, maintenance charges ka kya scene hai? Builders initial estimates dete hain, but baad mein skyrocket ho jaate hain. Don't want unexpected expenses. Ek friendly, peaceful community chahiye, isolated feel nahi. Koi specific tips ya red flags hain jo site visit pe miss ho sakte hain?