After further thought, I think it is dependent on whether or not the plane is actually worth the extra time. Can you build a new one quicker? Will it still be airworthy?
If you just have to build a new wing, or some other part(s), and have the materials to do it, that might be a good idea.
All depends. When I was getting back into this, I would sometimes HAVE to rebuild a plane to have one! Now it is sometimes easier to just start fresh, but a *good* plane will get consideration if it's not too badly broken.
Bill <><