Google 3D Warehouse is an immense resource of free furnishings for your shipping container home layout. Here is where I ended up after playing for a couple of hours. It certainly looks nicer than my first feeble attempt at this, which was so embarrassing I’m not even going to link.
As I gradually crystallize in my mind where I’m going with this, I’m thinking that I want to set a price point of around $12,000, which is about the annual rent of a one bedroom apartment these days. But that would give you a much larger place than this.
Even so, this doesn’t look so bad. And I’m sure it would look even nicer with windows!