Thanks for the information you all provided. I took a look back at the digital microscope I had (see the link below). It seems I can use for the for soldering.
This is what I did:
I kept the microscope on its stand around 3-5 inches on top of the PCB. Then I adjusted the magnification to around 50. I could clearly see the very small pads and IC legs that I had trouble looking by bare eyes. I also adjusted the positionof the microscope such that when I move the board up, then on PC screen, the board will also moves up. I think I saved myself a couple of hundreds $$. I think it will work. The good part of it is that I can video tape all activities now.