btw, this is nothing about Share tips & tricks, techniques, general photography chat.
should post your thread @ Consumers Corner since it is Want to find out or give info on where, how much, how good, what to buy? Here is where you should be.
If you are going to have 400-500 4R prints on a single photo album, then perhaps you would like to consider printing these 400-500 4R photos onto a photobook instead.
It would be much more manageable and you can also put in some creative design.
I have done a 320 page photobook (11 inches x 13 inches) with 894 photos in it.
Some full page bleed, other pages containing anything from 2-5 photos.