If it was the only thing I had to do, one winter would be more than enough time. Since I have a full time job, and run two small businesses, entertain my girlfriend, have a bad back, broke my leg and have arthritis, it tends to slow me down some.
There is always some other vehicle or equipment that needs attention (and money), so the project that I want to do the most has to be moved to make room for the "have to" project.
That is why I am building a new shop. I can have a restoration or two all ripped apart and then I don't have to disturb it when it comes time to work on the "have to" projects. That way I don't spend so much time moving stuff around and looking for lost items, and spend more time playing "bolts".