As the containers are a "go to sea" for original use I hardly think humidity would damage whats inside? They are for sale/rent all over the USA as are old tractor hwy trailers. My local school uses 2 containers for dry storage. I really dont get them as a support for a bldg? I can see having either or both but not built together unless they were a freebie, which is unlikely. They will cost more than the materials to build the walls for a pole bldg..
"If I had my life to live over,I'd dare to make more mistakes next time...I'd relax,I'd limber up.I'd be sillier than this trip, take fewer things seriously, I would take more chances... take more trips...climb more mountains...swim more rivers...eat more ice cream." Jorge Luis Borges, at age 85