I ask them what they are expecting to pay. If they aren't open about that, I go looking for another. Start with why the employer wants the information. In most cases, the employer really wants to know your general salary expectations, so he or she knows whether there is a possibility of a fit. In any event, the employer can usually obtain this information through other means, so it does little good to avoid the question.
Most folks lie about their situation in the reverse.
But the consequences are pretty dire should you get caught. For that reason, I advise taking a more open and honest approach. If you have plausible reasons for relocating and your skills are valuable, you will most likely find an employer happy to take you. Everything is negotiable. You would also do better if, rather than hit them with a need for a couple of days off right after you start work, just negotiate one week later as a starting day and do your vacationing beforehand.