Welcome to the forum Tom,
Wow, you have a big ask there!
One only has to look at the cargo bay doors of the space shuttle to know that the precision and size can be done, but at what cost?
Do you need to set this up in different places and at different times or is it a once-installed, it is done thing? The answer to that will get you started with a cost range as a fixed installation will be much less cost than a moveable one.