Rajkot hidden charges at possession: what's the real damage?

Visited Ansal API's project near Kalawad Road last weekend. Honestly, I'm fed up of renting, landlord hiked rent again. Got a quote for a 3BHK at 95L. But I'm seriously worried about hidden charges at possession. My budget for this investment is tight. What unexpected costs did you face with Ansal API or other Rajkot builders? Beyond stamp duty, PLC, parking, what else should I factor in?