I would agree with most of what you said but there is a difference between a single family and multifamily in terms of rental rates and turnover.

If I were single, I'd be doing it right now.

Current tenant has been there 2 years, is now a single mom and has a good job as a nurse, but is constantly late on rent. 

I don't know about the specific add ons you listed, but I do know that my insurance went down when I switched from a homeowner to landlord policy on my single family homes. 

That said, although I think it's one of the hottest parts of San Diego, I still would be wary as a single woman living in parts of Sherman/Grant Hill/Bario. 

If single family home do a survey and check for boundary violations etc.Unless you are getting a sizable discount this may not be worth the effort.

@Jackson SandlandI don’t imagine a single business would have a real effect on property prices .

Most of the cities and towns you listed are mostly filled with single families, though.

I am focused on a buy and hold strategy with single family or small multifamily homes.

In house hacking, I believe the idea is to buy a property (single family or up to 4 units) using a conventional fixed rate loan with a low down payment and then to live in it for the required time and move on to buy another property the using the same method.