Gurugram property investment: What's the real deal?

Baliawas keeps popping up for investment, but I'm based in Dubai and can't do site visits easily. I'm looking at a 3BHK, maybe on Golf Course Extension Road, for potential rental yield and appreciation. My budget is around ₹2.5 Cr. Honestly, how much can one realistically negotiate with builders like Terra Infracon? Is 5-7% off the listed price even possible? Also, what's the actual all-in cost? Beyond the property price, are there hidden charges like OC or specific PLC that add up significantly? And for investors, is a Construction-Linked Plan smarter than paying more upfront? Worried about potential delays affecting my ROI. Any advice on payment terms and final cost transparency would be great.