SFBO with Seller Financing in San Francisco

[Jaime Rossini]

Can anyone walk me through the steps and requirements for buying directly from the owner with owner financing?  The property is a 4plex in San Francisco, one unit occupied with a protected tenant.  

Do I need to do a title search or does that happen automatically on change of title?  Do I still need title insurance?  Is the seller required to provide any inspections or other documents? IS there a timeline for closing since there's no bank involved? 

Any advice is much appreciated.