Ideally you'd want within a few blocks, maybe no more than half a mile for the comp to be accurate

@Carolyn Guertin investing in Detroit should be done on a block-by-block basis.That's actually difficult to do, so we ranked 104 of Detroit's Neighborhoods on our site as Class A, B, C or D to help investors make better decisions and NOT get ripped off.NEVER try to invest in Detroit using zip codes!

The problem is these are automated values that don't factor things in like views, condition, or even if one block of homes sells for more or less than another. 

I will say that once the floor was down, and we found the raised spots from the debris that didn't get cleaned properly, I noticed that repairing the floor is much more of a pain than I expected it to be.

To take measure of self, to learn and improve from "education via pain". 

Just so you all know, my brother was blocked by a moderator (I wonder who), but wanted to convey his response here (see below). 

In this county there was only 1 McDonalds that close and it closed to move a block away at a traffic light, from there former location in the middle of the block not at a traffic signal. 

I own out of state as well, but it's a blocking and tackling, hands on, dirt in your fingernails game if you want to earn the return to make it worthwhile. 

@Jay Hinrichs, you where right.You know I've been around the block long enough now and have seen a lot of $#@%Gino is a top bloke.Very genuine approach to coaching and no BS guru hardcore sales crap.Hat's off 🙏

And sometimes you are blocked because the wall you need to put it on has a window.