Ronstar
Moderator Emeritus
I built my own, but not just before or during retirement. I built mine about 15 years ago as a detached 2 car garage and it has morphed into my workshop. Did all of the work except the shingles and the electrical service to the building. If I were to do it again, I would make it twice as big. My only advice is to plan for the future needs - space, electrical, maintenance, etc. Have conduits between the house and workshop, use maintenance free materials as much as possible, lots of lighting and outlets, etc