Hidden costs first-time buyers miss in Noida Extension flats

My lease ends in 4 months; really need to finalize a flat in Noida Extension. I'm looking at Evermark Maharishi Enclave (ongoing) versus Dream Shyam City (ready). Dream Shyam's ₹13-32L looks tempting, but what's the real price per sqft after all hidden costs? For ready projects, what's the actual total cost of ownership once stamp duty, registration, and RWA are factored in? My parents keep warning me about extra expenses. For Evermark, how much do PLCs typically add to the advertised price? Honestly not sure which is better value.