As someone who has gone down this road, from what I've read: Shipping container homes are expensive once you finish them up like a house. It would cost more to build an equivalent shipping container home to my stick built house, not counting the land. Keep in mind housing costs typically include the land, so when you buy a 300K house, a lot of that value is in the land.
Living in such a container will require the use of plumbing and electricity for it to be legal to live there. In most parts of the US, with few exceptions such as Alaska, it is illegal to build a structure without a permit and building codes unless it is 200 sf or less. In most places, it is also apparently illegal to live in an RV on your own property unless you have sanitation issues covered, etc. RV parks for example, are legit because they have hookups. If everyone just dumped their waste on the grounds it would become a cesspool of diseases in no time.
Sadly, it appears the man wants to keep us on the grid.