In a seller's market you need to identify the social and economic underlying issues of a distressed property owner or property.Now, as to the 70% rule (guideline).

When I take a look on the internet, I see a lot of brick houses selling for what seems to be very low prices.  

Regardless, I'll be sure to let my attorneys know that they should reconsider their legal opinions because there is some random guy on the Internet without a law degree who is so confident they are wrong, he doesn't feel the need to support his assertions with any data?  

The online marketing generally creates leads who initiate contact via the internet (email) or phone.

Look up CPTED on the internet and start making modifications to the property to make it a less desirable place for criminal activity. 

For the most part It seems pretty harmless to let a tenant of 9 years to become your friend on social media.

They might do a couple of social media posts about it, but I wouldn't expect a mass mailing that would basically parrot everything that's been in the news, on TV and the radio for the past 3 years.

You can then look them up and call, send direct mail, or find them via social.

Traditional banks will not lend to someone without a social security number, that is as far as I know.

General Liability insurance; vehicle insurance; surety bonds; fleet tracking; cell phones; W-2 employees that have social security, medicaire, medicaid, benefits, and taxes.