Hey Eadai, if I were in your shoes I would wait until I get back from holidays to start LT as it requires 100% commitment, it is difficult especially in the first few weeks and if you arent able to do it while you are away, then wait till your return. If you did contemplate doing it for the two weeks, you will have to refeed for a week which involves taking shakes in conjuction with specific food each day.
Hope that helps a bit...