Times have changed. Maybe SD is different than OC and LA, but there are wait lists for live aboard slips.
Slip rental is now a beast in OC/LA too with the slip being nearly rent on a studio apartment.
A quickie check shows Shelter cove is varied rate but a 40′ slip is $17.5/ft. or $700 for a 40 foot. Not sure a 40 foot will go in it, may need the 46′ slip or 52′ slip which are $19.5/ft and $22.5/ft and pricing is on overall length including all bolt-ons (swim platform, bow