If you could just drop a shipping container in there and connect them together, couldn't you build all kinds of useful things? I think this is bigger than you think, even though it looks like a weird little story. Tunneling and then easily building walls for your tunnel is civilization transforming. If you're using hydroponic growing, and the fertilizer is added to the liquid, this is the liquid that you water the plants with. Does anybody know how big it is 10 to 1 difference or like a 20% difference? As a person who lives in the world, I feel like at least somewhere in the 40% range would be better.