Depending on where the home is, it could be designated "historical", which could limits imposed by the city on how you are allowed to repair the home.  

There historically has been poor upkeep on these properties and most of them are quite old, near 100 years or more.

I believe there will be a lot more buying opportunities due to people overpaying when mortgage rates with at historic lows.

Historically we’ve noticed we submit an LOI on 1% of the properties we underwrite.

This is presuming that the disclosed CPI is accurate, which historically and notably it is NOT.

Mortgage rates are historically low during this time.

We had new siding, soffit, fascia, gutters and windows installed while maintaining the historic slate roof.

If you can actually achieve the cash flow that you indicated, then that is a great options as the cash flow will improve as the rents increase and historically LA has outstanding property appreciation. 

Given that most of these are private not sure where to look to see what data is available to analyze, but any ideas where i can hunt down historical multifamily / real estate syndication historical returns?

I need a dedicated 8x16 parking spot, historical considerations, connection to sewage required if there is a washer (even if you have septic) etc.Plus it must meet building codes which means that habitable rooms must be a minimum of 70sqft and if a room has a sloping ceiling, any part of that room with a ceiling below 5 feet in height is not considered as habitable.So check with the city and find out what's what.