Their papers and documents, some 20,000 boxes worth, are stuck in a storage facility in Linden, N.J.
They have all 20,000 boxes of their paperwork stored inside their home in Seattle, WA. 
mnli hypothesis: They have all 20,000 boxes of their paperwork stored inside their home in Seattle, WA.  premise: Their papers and documents, some 20,000 boxes worth, are stuck in a storage facility in Linden, N.J.