The secret was I dedicated a section of a big table (4 ft by 10 ft section of porch roof left over from the hurricane rebuild) in my airplane hangar. I would work on a part of it, then stop to let the paint or glue dry and usually come back the next morning and do the next step. It took many days to do the whole thing, working less than an hour each session.
I just wish I had replaced the antenna post atop the tail with a little piece of aluminum; I used plastic and it kept breaking. I finally realized I could have made it of of a sliver of aircraft aluminum much easier, and it would not have broken; by that time it was too late.