You should know who is living in your property to ensure they are not a danger to the rental, the neighbors, or yourself.There's also the risk that Tenant A moves in, then later adds Tenant B without adding them to the lease.

That's what puts you into the ADU territory and then all the follow on regulations.  

The not so nice section I would not say is outright dangerous but its not a pretty section. 

This is severe left, progressive territory.

I also think it's dangerous to bank on appreciation, but in the valley most neighborhoods are appreciating at rates better than 10% annual. 

People that tell you it’s dangerous may be hanging with the wrong crowd, or involved with different circles or stuck in some time warp.

What I didn't realize is that a "Petition for Rule to Show Cause Why Property Should Not Be Sold...." has to be filed by the tax authority attorney to get a free and clear sale, so it is still in "upset" sale territory. 

That's dangerously close to the 1% rule, and a lot closer you would get to it than if you purchased a new construction.

Remember, the notion of amassing wealth without investing is a dangerous myth perpetuated by self-proclaimed experts.

Although I would not do IB on both Vrbo and Airbnb at the same time, because of the danger of double booking and the associated penalties.