Fed up of renting! Noida investment - need advice

Landlord ne phir rent badha diya! I'm finally taking the plunge and buying in Noida. Been looking at Noida Extension, specially near Sector 151. I'm so confused about under-construction vs ready-to-move flats, though. Read so many RERA horror stories online. Is it really worth the risk to save some money? ATS Infrastructure ka ek project dekha tha, looks good but OC nahi mila hai abhi tak. EMI vs rent math is killing me. Down payment is huge, but monthly EMI is almost equal to what I'm paying now as rent. Has anyone else faced this? What's the real rental yield situation? Honestly not sure if I'm making the right decision. Koi advice do yaar!