I intend to do this via the "upside-down" method. The only problem is, I'm sort of stuck between stages. It's still in the 40s outside, so I can't move this to my garage yet, but the room where I've been doing the work is too small to stay in at this point. I may try to find a step further down the road, like the head rests, that doesn't require access to a completed fuselage. The only problem with THAT is that I don't have the materials for most of those steps.
I think I'm going to keep building in my office for the time being. It will be at least a month, perhaps even two (it's the beginning of April right now), before it's consistently warm enough outside to allow the epoxy to properly cure, especially in the evenings when I have the most work time available. I have two options for getting the fuselage out the door. The first is to cut out the front window, and lower it down to the driveway (I'm above the garage). That's not as bad an idea as it sounds, because the windows here are cheap as dirt and are falling apart, so I had intended to replace them this summer, anyway.
The second option is to go through the stairway. I had also intended to replace the stair treads (they're all cheap pine, and have warped over time due to being exposed to the elements), and once they're removed I just need to temporarily remove the center support and I can drop the fuse down into the garage that way. The stairs are a good 39" wide so it should easily fit down if I go sideways.