Welcome to the site, Steve.

Construction crews leave their tools and materials on job sites with doors unlocked and theft is extremely rare.Location, location, location.

Also, as they say... not your keys, not your coins--so better have a very deep trust in whatever site you go with. 

This is probably a place where you go to one of the personal loan sites to borrow money or maybe a credit union. 

I highly recommend starting with a basic househack, easy barrier to entry and gives you a crash course in being a landlord who lives on site.

.: Anyone else getting phishing attempt warnings from using this site ? 

Computer or Smartphone, an internet connection, a blank Purchase and Sales Agreement, and Assignment Contract, an investor friendly title company or lawyer(depending on which one your state uses for closings), a bank account..

So I have recently listed my rental unit on various sites.

There is a ring camera system that has a job site security package as well some of my investors use for their projects do not have internet it works off cellular connection. 

Perhaps because they know people will do a simple internet search and see the *****torm that's brewing?