Reading your post brought back a lot of memories of when I experienced times of unrest and less than perfect circumstances to be creative.
And yes, it is not necessarily the physical space, that is important. Although it does help me tremendously, that I finally have found a place, where can work in peace without worrying about cleaning off my stuff to cook on the kitchen counter or a tiny dining table...
Sometimes it seems difficult to focus, when too much paperwork or stuff around the house want my attention, but once I get into my flow, it can pretty much be anywhere... in the end its more an issue of "convenience" maybe.