All these things are mobile, when the Rove's feel the heat, they load the trucks and move them along. They're probably headed for Mehlman's house.
You are correct...it's not even Rove's house! It's a pseudo-Rove residence, his real house is much bigger and has a 5-car garage for his Halliburton stock-funded sports car collection. Bush and Rove have been getting kickbacks for years from the "Evil Weather Machine" where they can rent out man-made disasters for profit. LOL.