Suggestions;
First thing, read the "Tenant's rights" section at CA.cov. It covers Landlord's rights as well. Even if you end up using a lawyer you should at least know the process. I think the City of San Diego also has a section on Tenant's rights (which is also Landlord's rights).
Second; get the NOLO books - they have some specifically for CA avail online AND printed. Bonus? They are tax-deductible. Think of them as the Textbooks for Rental Management School.
Third; Get a paper calendar. Start writing everything on it - -the date, time person who delivered the 3 day notice (attach copy of notice), mark down all the rest of the deadlines. These may be ACTUAL days/business days, etc Mark down the first date you can file with the courts, etc. Read the rules carefully -- some days don't count (weekends, holidays), some months have 31 days, etc. Again, even if you use a lawyer, know the process & what to expect.
Fourth; Look up her name in the Court records of wherever she may have resided to see if she's been evicted before. SmartMove & other screening services do this for you, but that's for your NEXT tenant. If she has multiple evictions, proceed directly tenant removal services (based on conversations with other SD landlords) and hunker down for the long haul. I think the service my friend used was called "Get'em out" or something similar.