A few considerations:Cost - I anticipate having relatively significant resources and want to live in highly desirable locations, but at the same time, I want to cut costs significantly from my lifestyle in the LA market. 

Now the Oranges' have been lapped by their sister towns, such as Newark, Jersey City, Harrison, etc. in terms of significant gentrification in the past decade, whereas the growth in Orange has been relatively stagnant.

I too am relatively new to BP compared to some who have been here for years.

Heloc interest used for personal purposes (not business, real estate related) is no longer deductible as of 2018.

For a side business (somewhat related to real estate) I am in need of high quality translators to translate some legal documents and marketing materials, in the following languages:Chinese (Mandarin), Japanese, Russian, Korean and Spanish.Looking for professionals with experience, not google translate, or fiverr, or the like (i.e "high quality")References would be greatly appreciated.

Amazon could either deduct this fee from the seller's proceeds or call it a wash considering they don't need to pay a mortgage broker and can strip the loan of those related costs.

Other random expenses could be included like a portion of your phone, wifi, travel, or other LEGITIMATE expenses related to running your real estate as a whole (and not to specific properties). 

Violent criminals, drug users, drug dealers, prostitutes, sex offenders, and many other criminals run a very high risk of offending again and I wouldn't want to expose my other tenants to that.

I'm a relatively lazy investor.

I would use skip tracing, try to find relatives maybe?