If you can keep the printer mostly level, and the distance isn't too great, then moving it can be done without draining.
I have moved several large epsons without draining, including up and down stairways. I used enough people to keep the printer somewhat level even going up and down the stairs, but certainly it wasn't completely level.
However, if you tip it upright, you may have a mess on your hands with ink leaking out. The pressure system simply squeezes the ink bags inside the cartridges when the printer is on, and while shutting it off does sort of vacuum seal the head, I've seen a couple of printers that had some serious ink leakage that were handled a little too roughly.