How do I move assembled LEGO sets?
When I was a child and our family moved, I took apart the larger sets into easily manageable pieces. For example, taking off wings and antennas of starships. Then I tetrised all the pieces into shoe boxes and other closable, stackable containers that could then be transported by almost any means. This method required reassembly at the destination but thanks to the planned breakdown it was easy to do. If I remember correctly the boxes were lined with cloth to dampen vibrations and prevent scratches, so nothing really got damaged.