TG,
CAR numbers seem very reasonable for market rent at 2400 and market value at 600 to 650K.
As for historical numbers, here’s one that I know. In 1997, I bought my first townhouse in Encinitas. It wasnt the bottom but was right when prices had started increasing. I paid $190K (a year earlier it would have gone for about $175K at bottom). Market rent was about $1300 back then (and had probably gone up at $100 in previous year also). That would put the multiplier around 150X but you also need to factor in $200 in HOA fees. If you back those out of the rent to make comparable to a SFR you are up to around 170X.
Hope that helps. Still trying to clear off the fog from last nites wine tasting event…..