Will Smith was using a trailer so big, the business people in Soho got it kicked off of the neighborhood streets and into a parking lot
53 feet long, 1150 square feet of space, double decker, 2 bedroom two bath, 30 tons, granite bathroom and marble floors, and offices for Will Smith's staff, a full kitchen and bar too. Another just like it serves as a mobile gym for him, and they rent for 9,000 a week
Asking price is 2 million by the manufacturer, Anderson Mobile Estates, and this one seems to be regularly used by the movie company Columbia Pictures while the movie Men In Black III is getting filmed.
photos from http://www.dailymail.co.uk/tvshowbiz/article-1385926/Will-Smith-takes-New-York-block-2m-trailer-Men-In-Black-3-set.html