NCIS questions about Gibbs

Cafe Society
1
  1. How many boats has he built?
  2. How is he getting them out of his basement?
2

At least two. (I haven’t watched it since Abby left.)

SFAIK, they’ve never explained how he does it.

3

I’ll take best and/or wild guesses as to how the boats leave the basement.

4

Bilco doors?

5

I’d guess in pieces that are reassembled near water. They’re probably engineered that way.