We're looking to add a large (around 6mx6m) workshop at the bottom of our garden. Would like it to be insulated and have windows/doors so that it can be a flexible worshop/storage/gym area. We've been looking at companies that offer shipping container conversions but haven't found any companies with showrooms nearby so haven't actually been able to view any. Does anyone have experience of buying shipping container conversions or other large workshop buildings and have any recommendations for companies to use or things to bear in mind? We're in the Southampton area. Thanks.