Houses made for the homeless from old shipping containers

How do they get to the different floors....

Here the full article and it has the finish photo tinyurl.com/y8tzuspl

You had me at 'houses made for the homeless'

They're common in the Netherlands. I know a few students who lived in some. Apparently, despite being metallic, sound and thermal insulation isn't too bad. And yes, there are stairs in the back.