Greater Noida: The real total property cost nobody talks about?

Kya ABA Corp ke projects mein Sector 157 mein all-in cost estimate accurate hoti hai? I'm evaluating a 3BHK unit there, quoted around ₹1.8 Cr. From my experience, brochure price toh sirf starting point hoti hai. I'm calculating total acquisition cost including stamp duty, registration, parking, and especially PLC. Often, builders don't openly disclose all these charges upfront. Also, construction-linked payment plans versus down payment schemes, which one makes more sense for maximizing ROI given current market sentiment in Greater Noida? Jewar Airport ka appreciation factor toh hai, but cash flow management bhi important hai. I've seen this pattern before, hidden charges can seriously impact final yield. What's the community's take on negotiating these 'fixed' charges once you're serious about a deal? Any success stories or pitfalls to avoid for an investor?