I was down there in late April and rented from Alamo. Base rate was $5 USD or something but took the collision coverage for another $17 USD/day.
I'm a Mexican national, have lived in Tijuana, have family in Cabo, etc. but I took the insurance because having a traffic accident in Cabo is a pain. Locals from Cabo tend to be from other parts of Mexico so they don't know the roads and the state of Baja California Sur does not require a driving test to get a license.
I prefer to have the insurance appraiser come out and take care of the process rather than having to worry about coverage from Chase while waiting in the ministerio publico (pseudo-police HQ) for Chase to respond, etc. Cops will normally drag everyone without insurance to the ministerio publico until financial responsibility is determined. No thanks.
If you like local seafood, check out Toro Guero (both in Cabo and San Jose) as well as Guero Camaron in the non-turisty part of Cabo. Food is delicious and cheap. ^