I think you want a property manager that focuses on rental not sales (which may be what you had with a broker).Each market is so unique and situation depends on the facts and circumstances.

Is there a certain range in cap rates cash on cash returns or any other metrics that investors in the BP marketplace typically look for ?

The cheap part of town or mid range?

I was thinking of changing $ figures to percentage ranges, but again credibility is necessary.

Currently, have offers/LOIs on apartments ranging from 8-30 units.  

Let the PM help you decide if the rent it too low and let them put a quality lease in place.I've found rent to own properties in this price range don't typically work out since the tenant/buyer has too low of a credit score [I shoot for a 550 minimum] and/or doesn't have the additional down-payment needed.I'd suggest just having the PM bump up the rent as much as they can, get a signed lease and let it run as-is for as long as possible.I hope that helps.- it's always good to see another Hoosier utilizing this great site!

San Francisco is definitely a very unique market.  

So my wife and I can get a loan and we want to get a multifamily to "house hack" but everything is out of our range.  

The homes I have seen with pools are in the $1 million plus price range.  

It's an incredible city, witch will always by one of the most attractive and unique destinations in the World.