From 2BHK to 3BHK: The real cost shocker

Okay, I'll be honest — upgrading from my 2BHK in Indirapuram is harder than I thought. I'm eyeing 3BHKs or a small villa in Ghaziabad, around Sector 2B, budget ₹80L-₹1.2Cr. CG Housing ke projects dekhe hain, base prices seem okay, but the *real* all-in cost ka darr hai. Negotiation kitna realistic hai Ghaziabad mein? Kitna discount mil sakta hai, 2-3% ya 5% bhi? Aur hidden costs like IFMS, club membership, power backup, maintenance advance... yeh sab mila ke kitna extra lag jaata hai? What was your final cost multiplier? Any tips to uncover these early?