On the other hand, pros include increased cash flow, engineer-based data for the clients CPA, audit protection (with the right firm) and the ability to deflect that recapture fee with a 1031 transaction.

The landlord should be named on the tenant's insurance policy for additional protection and to assist with tracking compliance.

I would protect myself and cut my losses so I was not looking over my shoulder or getting high blood pressure every time I heard a knock on the door (hoping it is not the FBI showing up to ask you some questions). 

Expect a custom ADU to take 9–18 months, with 3–6 months for design and permitting and 6–12 months for construction, depending on complexity and contractor availability, and the speed of processing permits.

@Ryan Vienneau I'm a Buildium customer too, and it blows my mind they don't have credit card tracking in 2017.

Choosing an STR-friendly area can save you significant hassle and protect your investment in the long run.

Local lenders and credit unions could face insurmountable losses to their balance sheets and customer bases as well as the downstream financial and real estate service sector.

LLC offers better legal protection.3) Setting up in states that allow your identity to be hid is also overblown.

Quote from @Kyle Carter: What role does insurance play in protecting your investments.

This is primarily what makes their work product substantially lacking in correct English grammar, legal protections, timely professionalism and many other ways any Securities Attorney will point out to investors.