3BHK hunt in Noida: All-in cost shocker

Spent the whole Sunday checking out options in Sector 107. Blue Square Infrastructure ka 3BHK pasand aaya, wife ko bhi. Quoted ₹1.3 Cr for the flat. But all-in cost with PLC, parking, maintenance advance ₹1.6 Cr tak pahunch gayi. Isme hidden charges aur kya ho sakte hain? Negotiation mein kitna expect karein, 5-7%? Kids ke school ka bhi tension hai.