I didnt read that thread but I can tell you that if you don't personally see the property you buy, you still need to have 3rd parties go in and verify stuff for you. Inspectors, appraisers and video walk throughs of the property should all be steps taken before you actually buy. You can get scammed easily.
I personally live in Texas, have bought 3 rentals in Indianapolis and 1 in KC and have personally only seen one of them. I am very methodical and strict about what I buy though. Cant just buy any house of course.