Hidden charges always destroy your real ROI

Two years ago I thought I knew everything about property deals. But yaar, yeh hidden charges jab possession ka time aata hai, they can really mess up your ROI. In New Delhi, I’ve seen builders quote one thing, but registration, PLC add karke total cost bohot badh jaati hai. Kitna realistically negotiate kar sakte ho builders se? 2-3% se zyada milta bhi hai kya?