if its just moving it to a different part of the house make sure its somewhere that can support the weight. Otherwise drain the tank, and get some friends and lift that bad boy. Be careful about banging it around when moving, however it isn't as daunting as a task as it might seem. The lack of a sump makes it much easier too. depending on how long your fish, rock, and corals will be out of the tank you might want to put them in a bucket with an airstone (live rock in a separate bucket so rocks dont potentially fall on or hit a fish). After moving you will want to keep an eye on your parameters as removing that much water might recycle the tank. However most of the beneficial bacteria is in your live rock, filter, and substrate meaning that as long as those don't dry out the bacteria should live.