They don't come any bigger than this. Not only is this tank HUGE but it's also scaped by the most famous Aquascaper in the world, Mr Takashi Amano - an inspiration for me and one of the reasons I became interested in planted aquariums.
To take on a tank of this size is tremendous - you would certainly want as much of it to be automated as possible such as water changes, and even better if you have others to maintain it for you. Nevertheless truly incredible don't you think?