My crowded basement shop.
Here's my homemade air cleaner. It's a 20" box fan with a couple of furnace filters in front of it. Captures a lot of dust, but much too much gets through.
Here's the worst thing about a basement shop with no walkout.
The handrails & newel post are removable.
I take some comfort from this picture of James Krenov.
From A Cabinet Maker's Handbook by James Krenov