3D Animation from CAD files

Design details: My client manufacturers modular hospital equipment and we need two short pieces of animation 13"seconds and 16" seconds.

The first animation is to show the 12 different configurations that are possible with the 4 key units.
And the second is to show how hydrogen vapour fills the unit.

Attached is a more detailed brief along with illustrations for layout.

Work is to start over the next few days. We will work closely to have concepts signed off by the client as we progress so that we get this right first time.

Please only apply for this if you have previous work of a similar nature that you can provide as demonstration material.
Please provide direct links for me to easily see you previous work, along with a fixed price for the work.

Texture of the units is important, as is lighting.
Also of note is the need for the fog/gas to look realistic.
Ideas for the visual style: 3D Photorealistic
Extra notes: