I would go for two single family detached, about 2,000 sf, built 2012-present. 

I'm an investor and don't live in a duplex, but I'm intrigued about "SB 9 ready" properties that are already detached duplexes, say on a corner lot, and can be easily split into two.

My property already has a SFR and detached ADU .

So the county has kind of devalued things in my opinion because of zoning changes.From the County Website:If a multifamily or qualifying mixed-use building exists or is planned for this parcel, the following ADU's are allowed: Detached ADU's: At least one and up to two detached ADUs, 800-1200 sf dependent on FAR and lot coverage.If a single family dwelling exists or is planned for this parcel, an ADU and JADU may be allowed, subject to approval for a non conforming use.Even though only one unit is allowed and a single family exists it seems we can't do 2 detached ADUs like what would be allowed with a multifamily building ?

I'm an investor based in Los Angeles and I'm planning on building a detached 2 bed 2 bath ADU (garage conversion) on my home to house hack, and eventually will rent out both units.  

I have this rental single detached home that is 100 years old.

Almost went with one of these before going under contract on my detached sfh in North Raleigh.

The biggest obstacle in my mind right now is developing metrics to analyze markets.

Low occupancy can be the most damaging obstacle property owners can face in their properties given for lease.

Each X represents a chance to make money.As you follow the map, you learn how to buy and sell these properties, making a profit along the way.This journey involves learning about different types of homes, neighborhoods, and how to make smart decisions when buying and selling.You might face challenges and obstacles, but with the right knowledge and tools, you can navigate the road to real estate riches successfully.Just like any journey, it's important to be prepared, make wise choices, and keep learning from your experiences.With determination and the right guidance, you can travel this road and work towards achieving your goals of real estate wealth.