this is a kran tower i made just now, and then attempted (note the attempted) to texture it. [edit] i removed the old renders and the wireframe[/edit]
[edit]
help... 2 hours to go and i am only just posting my final design.....
here is the model from different angles (i have changed it like mad):



and the wireframe:

The principle is the same as last time (see below), except in 2 buildings. It also has:
-571 polys, 1256 edges, 755 vertices
now i can finally go to sleep......
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i have designed it so that there would be 3 groups of 2 people at the watchtower at 1 time (1 set patrolling on the ground, 1 set up the tower and 1 set asleep inside the tower) on a rota.