Container of Dreams - what's inside?

What's inside??? 
Well it's time to start thinking about the interior and how I am going to configure the layout of the Container of Dreams. It's a really small space, which is the point of the project, so everything has to be thought through really thoroughly.
I want items like furniture, storage, etc to have multiple uses where possible so need to take this into consideration as well.
I love the concept of Murphy Beds - you know the ones that pull down when in use and the fold back up into a space in the wall much like a cupboard, but in this tiny space I actually believe it may take up too much of the available space. I think a lounge that becomes a bed (sofa-bed) will be a better way to go as it has dual functionality (two pieces of furniture) and most importantly functions as a lounge when not in use as a bed.

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I have also noted the condition of the container, both inside and outside. Given that it is over 20 years old it is in pretty good shape overall, however there are a few noticable exceptions. After a small amount of recent rainfall I thought I should go check the thing out for leaks, low & behold there was a small puddle in the far left corner. That's when I noticed the patch on the ceiling - not a fantastic patch job either! (see above photos) But we work with what we're given.... and this got me to thinking about using this hole to my advantage. Now I am considering possiblities of some kind of an access hole to the roof-top deck. This needs more thought, but there's loads of ideas like a spiral staircase, a ladder, climbing wall, you name it...
I am now working with some 3D software to try to come up with the best layout for this project. I intend to try lots of different ideas over the coming weeks, even months, here's my very first attempt, and even includes my stairs up to the roof... please enjoy...