Ghaziabad investment: Negotiation and hidden costs for NRI?

Okay I'll be honest — I'm based in Dubai and planning to invest in Ghaziabad, but the process seems confusing. I'm looking at a 2BHK near Judges Enclave, maybe from Paradise Group, around ₹75-80L. My main concern is negotiation. Kya price negotiation sach mein possible hai? Kitna realistically knock off kar sakte hain? Also, all these hidden charges at possession time, like PLC, maintenance advance, they add up a lot. Should I go for a construction-linked plan or more down payment for better ROI? Can't visit often, so need ground-level advice.