ASK Developers Zeta II mein negotiation kitna possible hai?

Noida Extension mein property dekhte hue, I'm trying to figure out total cost. ASK Developers ke project Zeta II mein interested hoon. Kya builders se price negotiation sach mein possible hai? I mean, 3BHK for ₹90L, kitna down ho sakta hai? From my experience, only stamp duty, registration aur PLC hi ₹8-10L extra lag jaate hain. Plus parking, interiors. What's the real all-in cost for a 3BHK in this range? Koi hidden charges bhi hote hain possession tak?