Hidden costs buyers only discover after possession

The real price of a flat is never just the basic sale value. I'm seriously considering Green Pike Apartments or Maitri Apartments in New Delhi, both completed projects, but the total cost of ownership is my main worry. I work in real estate, so I know the hidden charges beyond the advertised price – stamp duty, registration, interiors, PLC, ongoing maintenance. Has anyone here actually bought in either and can share their *actual* final cost? Matlab, what did you truly end up paying? Also, for long-term hold, which project has shown better resale activity? I'm looking 5-7 years out. Should I be more worried about maintenance charges eating into potential gains for one over the other? Any insights on exit strategy or appreciation would be super helpful.