Negotiate hard on PLC charges; builders bank on ignorance

I'm based in Dubai and looking at Noida for investment, specifically Sector 10. I've noticed builders like First Villa LLP often inflate PLC (Preferential Location Charges) without justification. Always, always negotiate these down. They add significantly to the overall cost and impact ROI. Not sure if others have had similar experiences? Also, what's the real rental yield situation? Advertised yields seem too good to be true. Is it really possible to achieve those numbers after factoring in maintenance, property management fees, and periods of vacancy? Need advice on property managers too. Any recommendations? It's tough managing from abroad; need someone trustworthy and efficient. Any tips would be appreciated. Thanks!