Cheapest hotel parking from $7/day — but NO shuttle, Uber adds $16-30 RT
DoubleTree Brisbane offers the cheapest hotel parking near SFO from ~$6.99/day via ParkSleepFly, CheapAirportParking, ParkON, and Book2Park. Hilton's direct rate is $45/day. Self-park only, not covered, in/out privileges.
Critical: there is NO shuttle. You must arrange Uber/Lyft to SFO (~$8-15 each way, adding $16-30 round trip). Located 7 miles from SFO in Brisbane. Factor in rideshare cost when comparing.
Note: SpotHero's "DoubleTree SFO" listing is the Burlingame property, NOT this one.

Hotel parking from $10/day — on Veterans Blvd in South San Francisco
Built 2019, from $14/day — free shuttle every ~38 min
From $13/day via aggregators — free shuttle every 30-45 min
$19/day, NO shuttle — must use Uber/Lyft to reach SFO