Thanks for writing your experiences down so precise and readable. While reading, I had to think multiple times abouts the movie The Five Constraints[0], where a profound link is made between restrictions and a boost in creativity and new thoughts.
This is exactly the approach we had to adopt when we travelled around Europe in a camper (a sweet 1970s converted Ford Transit). I loved having to be creative about finding space and making sure every thing we took with us had multiple functions if possible.
I wish I could say we have kept this up now we are back living in the "real world" but some of the spirit has rubbed off and we're definitely much better at becoming less attached to particular belongings.
I strongly believe that most belongings end up becoming burdens if you don't establish a process of questioning their utility on a somewhat regular basis.
[0] https://en.wikipedia.org/wiki/The_Five_Obstructions