My probate expertise is limited to the many THOUSANDS of deals that I’ve done in California since 1978.

This can make the real estate investing process and management more efficient and less burdensome.Here's an article with additional FAQs on cost segregation studies that you may find helpful. https://www.biggerpockets.com/forums/51/topics/1113749-cost-segregation-faqAre you streamlining your services?

And yep, I was made aware a couple of years ago of that 12 person max and/or I think 4,000 sq ft limitation (or some size anyway) that requires a sprinkler system for all new construction.I don't think they're that wrong for implementing the requirement. 

Not following the requirements (within Seattle city limits will likely have additional rules and regulations) opens the seller up to liability.Additionally, the seller always has the option of offering "cash for keys" arrangement but be sure that no funds change hands until after the property is vacated and locks are changed.John

A recent study showed that 80 people are moving to this city every single week, which will continue to increase housing demand.

The value skyrocketed due to limited run sizes.

This is actually something I see as a benefit because it shows that the city is interested in facilitating the growth of that industry, and it's much less likely now that they would do a 180 and try to limit usage

You are currently sitting in Los Angeles's entertainment mecca and Mid Term rentals/30+ day rentals are a great alternative to the STR limitation.

It's also not going to scale as you'll quickly hit DTI limits even if you can get the numbers to work.

I started studying markets from Cleveland OH, Columbus OH, Dayton OH, Cincinnati OH, Indianapolis IN.