On a theoretical level an OBJ would work by importing it in Cinema 4D Lite, but as someone who has done CAD and engineering visualizations for over a decade let me say that this will require hours and hours of extra work to actually get usable renders because, quite simply, what you have is just a big blob of data based on a reasonably complex CAD layout. You better find a way to produce more useful files if possible or find someone with experience who can handle this. This stuff isn't for the faint-hearted and as per your own words it's apparent that you never have done any such work before and you'll only end up running into one issue after another and miss your deadlines...
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