Decoding Hyderabad property costs: Need community wisdom

Visited Salarpuria Sattva's project in Alwal last weekend. Builder ka quote toh fixed lag raha hai, but I'm trying to figure out negotiation. Hyderabad mein kitna realistically possible hai to knock off the price, especially with these bigger builders? Also, all these extra costs like PLC, floor rise, parking... they add up so fast. Are there hidden charges that only show up closer to possession? Trying to calculate my total acquisition cost accurately. Any advice on how to handle builders for better deals and spot those hidden costs?