I dont know about burying a 18wheeler trailer, it would probably just colapse from the weight, they are just plywood and aluminum sheeting, these shipping containers are meant to stack and hold weight.
My new goal in life is to get some of these badboys underground in the next 10 years.
Fuck that would be amazing. Just the fact that they have been professionally engineered, they are wired safe, enough filters to clean the whole area efficiently, they are perfect. Literally all you would have to do is plug it in, hook up a hose, and throw some clones in there to get started.
Anyone wanna start digging a hole for a new "swimming pool"