Hi all,
I have been poking around in Unity and looking at some YouTube videos on the subject and I have come across a free 3d modeeling package, which can export assets to Unity/CourseForge.
It's called Blender and can be downloaded here: http://www.blender.org/
I've had a little play and it doesn't look too difficult to build some basic stuff (tee makers, posts etc).
Anyway, just thought you might find it useful...
Gary