Dear Sri Mayuran
A smaller suggestion. Since Mahaalaya Paksham is around the corner, why not ask your vaadhyaar to help you perform pithru kriyas including pinda pradhaanam during the pithru fortnight?
Later, when the "extreme time pressure" has lifted, why not take a week or two off to visit Kaashi, Triveni Sangamam at Prayaaga, and Gaya, and do the rites properly and leisurely? Remember, you need your dharma-pathni at your side for the rituals, particularly preparing and offering pindam.
Remember also to take precautions if you are not to be fleeced by the greedy "pandas" at all three places. Get a friend who has been there before, to accompany you. Read up on the rituals beforehand and, if possible, master the main manthrams. Girve yourself a year to do this, if possible.
S Narayanaswamy Iyer