For dry storage if you'll be on the hard
for a while, look up San Diego
Boat Movers. As amongst other things, they have a yard inland where one can store, & or work on their boats. Or they did as of last check. And it's a fair bit cheaper than anything by the water
Also look into renting
a lot in a light industrial yard, or some space in one if you find a company in one that has some extra room. That, or split one with another boat owner in your position, etc.
They're fenced lots, again, inland. Where you can just have a lot. Or phone
, power, etc. as well. And I've rebuilt a few boats using them in SoCal as they were much cheaper than boatyards
, & didn't mind dust & noise
at odd hours.
Needs be, buy a cheap
RV or mobile office for the site, & a porta-john. And poof, a place to live where you can build on the (relatively) cheap
PS: What size boat, what's she weigh, & what's her air draft
with & without the spar?