Fed up of renting! Finally taking the plunge in Noida

Okay I'll be honest—I'm so done with renting. Landlord raised rent again! I'm thinking Sector 149. Heard SM Homes has good projects. But is it better to buy under-construction or ready-to-move? Kya kisi ko pata hai which gives better ROI? EMI vs rent math isn't adding up tbh. Should I just keep renting?