I like your space! I would second the idea of more lights (you can never have too much) and other suggestions made here. I would get some inexpensive particleboard for tops to your workbenches, with the overhang for clamping. It makes a perfect, smooth, flat work surface, and it's easy to replace when it's drilled full of holes and worn.
I also think if I were you, I'd consider finishing the sheetrock on the wall where your plastic is hanging, paint it a bright white. It will brighten it up your shop even more. And at the same time, you can make a holder of some kind for your drawings. Something as simple as thumbtacks, or several little spring clips to hold your drawings up in front of you. You'll be spending a lot of time studying your drawings. Put them at eye level, well-lit, and make it easy. Most of the mistakes I made came from not spending enough time looking at the drawing. It's time well spent.
I also like the idea of building your fuselage to the point of disassembly before final riveting. Now the only thing you'll have to figure out is where you're going to prime and paint things. I'm sure you don't want the fumes in there, wafting up into your living space and irritating your other half.
Not to mention the health hazards. So you'll be doing a lot of up-and-down the stairs with parts in hand, before and after priming. I painted a lot of my stuff outdoors. But overall, it's still worth it! You have a great workplace.