Prices Start at $40 dollars per month and up. We store Cars, Trucks, Boats, and Recreational Vehicles. Interstate Underground has a full compliment of storage areas to fit your short or long term storage requirements. We have 600, 000 square feet of combined freezer areas, 250, 000 square feet of cooler kept between 34 and 38 degrees and 1.8 million square feet of dry storage space kept at a ...