Assalamu alaikum. That sure is a wealth of info and jazak'Allahu khayr for the effort. Another thing worth pointing out may be that we won't have a car for some time due to lack of funds alhamdulillah, so no matter where we reside, DHA or Malir Cant area, will everything like supermarkets, groceries, veggies, internet etc and above all a masjid be easily accessible or rather walking distance?
WaliukumSallam. Bahria, Malir Cant, DHA e.t.c these are sort of areas where everything is available at walking distance. Masjids, markets e.t.c e.t.c that won't be an issue.
If you have budget issues then i think you will find following areas suitable according to your requirements
KDA Scheme 1/ Muhammad Ali Society (MACHS) : (MACHS)
Located near the City Center, MACHS is another best place to live in the city of Karachi. The presence of entertainment facilities like the Arena, Aga Khan University hospital, Expo Center, National Stadium, Large Parks & Lakes make this area perfect to live in. Its proximity to the Airport and Sharah-e-Faisal are another plus points.
PECHS (Society Area):
PECHS is one of the best planned localities of Karachi. It gives the touch of being in the city of Islamabad with roads as wide as in Islamabad, its greenery and area architecture. Its close proximity to Central Karachi, Presence of the largest shopping district; the Tariq road; Parks such as Hill Park and the Jheel Park makes this area perfect to live in.
Bahadurabad:
Bahadurabad is famous around the city for its shops such as Imtiaz, Naheed etc. People from all across the city as well as from DHA and Clifton especially come to this area to buy their daily groceries. Another thing that makes this locality very famous is the presence of the United King Bakery and restaurants such as Tooso etc. Majority of inhabitants in the area are from Delhi who had migrated from India during 1960s for better economic opportunities in Karachi.
Lalazar:
The best part about lalazar is that this locality is built next to the II Chundrigar road, the busiest business street of Karachi and when you come to this area you feel like that you are miles away from the hustle bustle of Karachi while being in the Downtown area. Another best part is the presence of the China Creek next to it, this make this place ideal for people who wants to have bungalows with boating hooks facing the creek. Beach Luxury Hotel and Karachi Yacht Club are also present in the area
KDA Scheme 33:
Scheme 33 is the best place to be in Karachi as it is located between Super Highway and University Road. Almost all important facilities including Schools and Hospitals are present in the area. Karachi University is just next to it.