D.P.W.H.O PROJECT - 18

I honestly thought buying a ready-to-move flat would be straightforward, especially after selling our big house. But D.P.W.H.O Project - 18 mein dekh raha tha, aur registry ke baad pata chala ki maintenance charges kitne high hain! Kids have moved out, I just want something manageable, low-maintenance. Is it normal for older, completed projects to have such hidden costs? New Arohi Apartments toh bahut mehnga hai, but at least unka brochure total cost of ownership ke baare mein thoda clear tha. Mera budget toh hil gaya. Did anyone else face this with D.P.W.H.O?