In day time one of my friend tries to offer namaz but most of the time he is not able to offer namaz. so most of the time he have to offer 3-4 namaz kazaa at night time…
You should not be missing prayers and doing kazaa unless its an emergency. Some people think "oh we can prayer later no problem" however one should strive to always pray on time. Emergencies etc - then the whole situation is different ofcourse.