My suggestion to create an annual motto doesn't exclude a wide spread build!
In opposite, I think!
Every annual GB-motto can be feeded with land based vehicles, flying machines, boats/ships or just only by figures, with or without buildings and/or landscape!
Having a motto only secures a certain connection to make homogeneity for the final award ceremony.
You can't compare apples with pears.
I can't imagine to be forced to compare a rusty VW T-2 at a junkyard, having a young tree growing through one of the front windows to a freshly shampooned VW T-2, parking at the banks of a lake, people doing BBQ by the open side-doors.
You know, what I mean?
Dear friend finsrin, hidden you have been inconsistent to yourself, by enumerating all this possible conversion/swords into plowshares themes.
For me, this is a motto, perhaps for the 2015-GB. (But then, I don't use the Ford Model A.)
I remember pictures of Jeeps, towing/pulling plows/ploughs, often seen in Great Britain's farming in the early after-war years, or a US-Halftrack used for let water/launch private boats and yachts at belgian and french beaches. Jacques Yves Cousteau's "Calypso" also is a bright example of converting a military vessel (a minelayer) into a civil exploration platform for the the joy, education and the benefit of millions of people around the world going to cinema or watching TV.
Or the monumental Martin flying ship/floatplane as a firefighter... two or three are still existing and in duty.
There are innumerable examples, just use your imagination...
Yes folks, If this isn't a motto, I don't know, what a motto is! :)
Norbert