I finished off my basement as a dedicated "War Room"...fortunate for me!!!
I have one main display..."built in"...
Stash is hidden in the cabinets below.
I have added several shelves and a couple book cases for the rest...
One more "built in" / recessed case for my choppers...
As far as cleaning goes...I blow off what I can, then use a soft, wide brush to get the rest. It is tedious, YES...but it's fun to look over the models again, now end then!