We stayed here a few weeks back, in this exact unit:
Luxury eco cabin near George Airport with private wood-fired hot tub, lake views, wildlife experiences, outdoor showers, and safari-style accommodation on the Garden Route.
www.buffandfellow.co.za
It's 2 side by side long containers, and I must say, the design is perfect. Granted that the patio is almost the same size as the unit, it would be a cheap add-on.
I could live in a space like this, especially on a farm or other large open space. It has 2 bedrooms, 2 bathrooms and a lounge.