This is a brilliant idea, well done for bringing it to us.
I think keeping it micro within the "standard" micro dimensions is the way to go, there is plenty of flexibility with the size and it also allows 2 things, relative attainability and the possibility of re-imagining what you can do in a small space, rather than going for a fixed oblong, as you don't have to use the maximum size.
Looking forward to how this project develops.