Omaxe Saini Majra hidden costs are a complete joke

Okay, I'll be honest — I completely underestimated the hidden charges in Chandigarh. Looking at an Omaxe project in Saini Majra, a 3BHK listed ₹1.5Cr jumped almost ₹20L after stamp duty and 'misc' charges. How do you factor this into your ROI? Are these charges negotiable? Any tips to keep total acquisition cost down?