Games tester?
Games tester?
GMAX was free if you can find it, that's basically a cut down version of 3dSmax...Then maya as someone suggested, I'm sure theres a trial somewhere.
There is also Blender which is free I think: http://www.blender.org/
Erm...There are quite a few I think.
Gmax if you can find it might be better over Blender anyway, I just prefer the way the program works.

I always thought about being an artist or a yacht designer. inventor,
tbh m8 you will struggle to find a 3d program that u can jump in to right away.