Organization of Blender calculation on 10 old iMacs?

Question

3D

In general, this is the question.
A little man appeared - a 3D artist. Teaches children and does his own project.
There is a class of aluminum iMac. Stands on them Leopard and Ubuntu. Everything is networked.
I would like to speed up the calculation of scenes. I heard it is possible, but I did not find an intelligible manual.
If anyone has - share ...
Shl By the way ... He would have to freelance a little. And then 3 daughters and now she is waiting for the 4th son. So he needs money.

Answer 1

https://cgcookie.com/blender/2013/08/09/setting-up...
step3
thickbox deadline