for $6-8/sq ft. you could buy granite tiles at Home Depot or Lowes. You can also get granite for around $20/sq ft from Panda Granite and some other places. Being that it is a shot gun style kitchen it shoud be straight forward.
If you go to Home Depot, they also have the pre-made counter tpos in the cabinets section.
Last I checked, Empire counter tops would also do the laminate for around $15/ft, and I think that is per liniar foot rather than square foot.
If you were really adventurous, you could try making thecounters out of concrete. There are recipes for doing that on the internet.