Bangalore property negotiation is a developer's illusion

Banashankari mein Prestige Group ka ek project explore kar raha hoon, investment ke liye. I'm based in Dubai, so site visits tough hain aur power of attorney se manage karna padega. My budget is around ₹1.5 Crore for a 2BHK. Mera main concern hai negotiation – Bangalore mein kitna realistic discount expect kar sakte hain, especially from big builders like Prestige? Is 5-7% possible? All-in cost breakdown ka bhi idea chahiye. Property price ke alawa, stamp duty, registration, PLC, parking, aur hidden charges kya hote hain jo possession ke time surprise karte hain? Aapka experience kya kehta hai negotiation aur total cost ko leke?