Another cost not immediately apparent in the cost of your tiles is the maintenance. How often will you have to clean it? What will you have to use to clean it and how expensive is the cleaning product? These “hidden” costs can outweigh savings you would initially experience with your materials selection.
This is true with the grout too. If you are installing these floors in a high traffic area, you may want to consider a darker colored grout. It will lessen the appearance of a dirty floor so you will not have to clean it as often.