I would be happy to connect with you to share my experiences in multiple states (CO, CA). 

In an additional six cities – Fresno, California; Jacksonville, Florida; Kansas City, Missouri; Los Angeles; New Orleans; and Santa Barbara, California – restrictions on legal operation are such that STR is practically impossible, though theoretically legal under very narrow circumstances."

That will save you 10% give or take, unless it was ever in CA.

Btw im speaking from experience in Los Angeles CA. 

California is pro-ADU right now so they are definitely pro-housing, but turning a single into a duplex is not always as easy as people think.

I live in California (SoCal) and own my primary residence.

Looking to buy an existing STR in Northern CA.

Simply ask around in the California forums and you might get lucky.If not I would simply do some calling and some quotes and let them bid each other out to try and get a good quote.

So I'm going to be renting out a condo in California on Airbnb.

Cash flow is negative, but virtually all MLS purchases in non-desert heat southern CA are cash flow negative and this has less negative cash flow than virtually all non-desert heat MLS southern CA properties.