Something like a monthly or weekly community building event would be nice.
You could give some limiting factors:
Type: Freighter
Material Type: Titan
Material Amount: 5000
Colours: blue, black
.
.
.
I have no idea how much details like thrust, crew, ... are necessary for the ai.
At the end you could choose the designs that would fit into the game and make
a pool of many different ai-ships for every tier.
I think there don't has to be any winning price. It should be enough when a player
ship is in the game for everyone.