came across a united enclosed trailer today. 7.5x20 7000 gvwr. trailer is in pretty good shape. has 2 shelves in the front, no dents. he's asking 4000.00 for it. is the 7000 lb rating enough for 2 w/b and 1 ztr? maybe another ztr or w/b to add at a later time. is 4000.00 a good price.