Using a render farm with 33 computers is really inefficient if all you're doing is rendering one frame.
To render one frame on a render farm, you'd have to crop it into 33 parts, and then combine ALL 33 parts in Photoshop. The length of time it would take to stitch together 33 layers of images is so huge that you might as well just use 2 or 3 machines, rather than all 33.
However, if you plan on rendering an animation, 33 computers might all be used, depending on how long the animation is. You could set it up like computer 1 renders frames 1-10, computer 2 renders frames 11-20, computer 3 renders frames 21-30, so on and so forth. This should work great.