First, take all the rock out of the existing tank and put it in a bucket or two and take tank water and fill the buckets... then scoop all the sand into the new tank and add more NEW sand ... then put plates over the sand and add some water back in out of one of the buckets and then add the rock out of one bucket... then add the rock out of the other bucket and slowly pour the rest of the water in... Add NEW already cured and established rock from the LFS. Top off the water with salt water and let everything settle. If the new rock you buy is cured and established, you'll more than likely have no cycle.
It's not hard, don't let that guy scare you. I've transferred and moved tanks many times. Just take your time, but don't be too slow as you don't want rock sitting out of water very long.