I plan to shop around more but I’m surprised that there aren’t more funding options in California with the recent popularity of ADUs help with the leverage component. 

Real estate is very tricky, if one can be successful it's because investor can see the hidden pitfalls and trap, and have ability to dance with the unexpected.

Build an emergency fund to cover unexpected costs, and ensure you can manage the mortgage without STR income if needed.

Any deal has three (3) important components: finding deals, finding money, and running deals (this one doesn't matter until you find the first deal and the money to go with it).  

Did you encounter any unexpected hurdles in the resale market?

Ownership and usage would be in question; thus they would be tied up legally.Concrete material components are mainly sourced in the US.

That's the key component that is usually missing when I hear other entrepreneurs/investors say they don't like QBO.Something else to keep in mind is your entity structure and how your entities file tax returns.

This is a more affordable option but only protects against named events.Comprehensive Coverage: Often called “all-risk” coverage, this protects against most unexpected events, except exclusions like flooding or earthquakes, which usually require separate policies.

so there is still a tremendous, tremendous demand component even without the same population growth.

As an investment property owner, this means less maintenance and fewer unexpected expenses from storm related damage, often resulting in more affordable insurance premiums, less wear & tear on mechanical equipment, roofing materials or exterior surfaces.