Hidden charges Stellar Group didn't mention upfront!

Based in Dubai, I'm looking at investing in Noida. Trying to figure out if ready-to-move is actually better than under construction after all the RERA stories I've heard. Sector 29 seems promising, but the PLC charges by Stellar Group are insane! Anyone else faced this? Also, rental yield dikhate kuch hai aur milta kuch aur hai, right? I can't do a site visit myself, so need honest opinions. How to negotiate these hidden costs? Any property manager recommendations bhi chalega. Hope this helps someone.