Crorepatti bhai, I am not an engineer but my view is that compaction is not a good solution.
Firstly, compaction will not guarantee that the house foundation will continue to be stable over a period of decades. No matter how hard you press mud-filled land, it cannot compare to the strength of natural terrain where the soil has gone through a process of natural compaction over centuries.
Secondly, if you press the land by compaction, your plot will become lower than street level and you will need further filling.
The real solution is to install deep pillars/foundation with concrete and steel. This can be very costly. So the safest option is to spend Rs 15,000 for a soil test before Bayana. Maximum you should pay a small token money before the soil test.
Dear Sahn, as for my view of Margalla Avenue, I have no idea when the Government will build it. But the two things that I can say is that this not a priority for the Noon League; they are spending all their money and energy to complete the Metro Bus project. They think these politically motivated projects plus solution of load-shedding issue will secure the next elections for them.
Perhaps they may give some attention to Margalla Avenue after 1-2 years. InshaALLAH.