Maybe talk to a radio control model club in the area. Some of their planes, not many, have wingspans that long and they have to move them around somehow.
“She needed a very robust cradle, and will have her own road registered boat trailer once she is done,” Titanic reborn as amazing 4m long, 2000 part 3D printed 1-72nd scale model
Very simple: dig a trench to the nearest waterway, let it fill with water, and then tow the monster to its destination (assuming she cannot sail under her own power). A similar method was successfully used for the much bulkier Phoenix caissons back in '44. Michel
If model is sturdy, I suggest something like this: 1. mount some wheels under table top; 2. put two groups of 4 (or 6) car jacks and lot of blocks under table top (watch out for stability!); 3. cut away table legs; 4 lower table top step by step; until it rests on wheel; 5. Louding into van/lorry: same process, other way around.
If you can construct a temporary extension to the work bench and can obtain, or have made, some sealed tubes that can be filled with air or water, you can move it slowly to the transporting vehicle by putting the unfilled tubes under the vessel then inflating them. Google - Flexodams for a bit more info. If you aren't too sure of the tubes, put wooden rollers in their place once you have jacked the hull up with the tubes and reverse the process when you get to site. That's the way the big boys used to do it. Don't forget to make a good cradle for transport. I can send some pics from an old brochure. I have to confess that we never moved anything that small in this way. Good luck!
Get a 20 foot long bed van. Lots of strong friends Beer (for later) Build a cradle or wedge with rolled blankets Wide lifting strops or improvised slings. If not too fragile, secure in van to stop any movement. How heavy and fragile is it? OR pay experts do move it!
Me again, you don't need to build a platform to go all the way to the van, just another work bench of the same length, or a bit more. Once you have the ship on the 'new' bench you move the old one up and use it again. I attach a slightly bigger job, but this was a Flo Flo
Contact your local Army Reserve unit, preferably engineers or logistic specialists. They could see this as a useful exercise and with a PR aspect too.
Excellent news! Using an 18-ton trailer to move a 32,000 ton ship is a feat in itself I hope that the recipients will complete the model. At 17ft it scales out at around 1/45. Hopefully the standard 1/48 scale was used, which would mean that finding kits of aircraft and crew to enliven it should not be a problem.