Moved an 8x3x3 540 gal with a pickup and two people. One of the most sketchy things I've done yet.
I had my 4' 120 gallon delivered by 2 guys on a tricycle with stand lights etc.
This is how big fish tanks are moved.
http://www.monsterfishkeepers.com/forums/showthread.php?343326-Upgrading-Monster-Style