One Person
Yeah, it is doable but it makes it a whole lot easier and faster if you have an occasional helper. ESPECIALLY the cabin top. It is not really that heavy but it is awkward and it get fit many, many times.
As for the wings, I built a padded rolling dolly that I used to balance the wing on. When it came time to fit the wings, I placed the dolly mid wing, rolled it up to the fuselage and stuck the bolts through. I had a helper but it could have been done by myself...