The defining metaphor for this wiki about amateur-built boats comes from the book Boatbuilding in Your Own Backyard by S.S. (Samuel) Rabl, Cornell Maritime Press -- first ed. 1947, second ed. 1958.
One can build inside or out, in the attic, garage, basement, or dining room.
Each place has its positive and negative aspects.
The important thing is to pick a design and a place, and get going.