The fine print is too fine to read. Interview several civil engineers to find the best-qualified person for your objectives. Hire the best candidate, meet with him or her as often as you feel the need and watch their work with a cautious but not suspicious eye.
Jim, all I can suggest is secifiy dual-axles and ten-ply tires. Two years ago I downsized for the 6th time in my life. The event was due to divorce by a wife who deserted 900 miles and soon became frail so much she could not return. Living in her house I had to vacate and move. I looked at...
Since 1994 I have been using Damp Rid which is a desiccant flaked chemical that absorbs moisture in rooms. It just takes routine emptying of the bucket(s) about every 2-3 weeks during the warm months and purchasing Refill product in the 42 oz. bag or 7.5 lb. jug (Walmart.com).
Could your idea be applied to a 20' shipping container? I read yesterday there is a shortage of shipping containers but the article did not state the lengths which are short in supply.