That's disgusting...
Not to mention that you really don't need to go through all of those precautions when you are trying to color calibrate, SURE there are some variables. But you certainly don't need to go to THIS guy's measures. Did you paint all the windows black so the sun wont shine through to mess up your viewing or color calibration?
I use a 15" Macbook Pro, and it works wonders for me... I can sit at a desk, use a mouse plug all my stuff in, or I can sit on a couch or wherever and do whatever I need.
Whenever I am at home I plug in an external monitor (nothing special) and use that bad boy so I can have a little bit bigger viewing area, but you can definitely live with the 15" no problem.