Joule is well regarded. Dudley is based in
Washington state hauls north south, sometimes east west he is good too.
The only do it your self yards that I know of are Dricols in Mission Bay not Shelter Island, there is a
boat yard in Oceanside that will allow you to
work on your boat. You may have some luck with Knight and Carver in the south bay. None of them are
cheap especially compared to what you see on the
east coast and FL. You will need to have all the insurances and comply with the state of California's
regulations.