I realize this is a good gig for you, but did anyone consider calling Iron Mountain (or equivalent) and asking them to ship the boxes off to some desert warehouse for x number of years before shredding them?
I love Iron Mountain. Given, I don't work with them face to face, but when I need a report, our librarian takes care of it and I generally get it in my hand by 10am the next day. I think that is awesome, especially considering the amount of data my company alone stores there (most of the reports I look for are qualification test plans and reports from the late 70s to early 80s).