Agree with MM. It is not at all a good move at all. Keep in mind, the employer has the option to hire somebody else in your place as the picture he will get in his mind is that you are trying to act tough at this very early stage of employment, what would he be faced with later on when you are already in the company? Also, the employer can go back on his offer once you land here, and this does happen. Just don't spoil your relationship with him. Grab the offer as it is if it is giving you savings, and come over.