Cash flow in excess of $200 per door and on track for a return in the neighborhood of ~10%.  

At $150k you are well past the inflection point where rents stop tracking with home value and are in areas that make for nice places to live, but lousy places to own an income rental property.

I've been sharing my goals and personal balance sheet with two friends for some time and we share ideas and hold one another accountable and it's invaluable for me (and it has the added benefit, if I were to kick the bucket tomorrow, that they could help my family get back on track).

Either way you go lenders want to see a track record so getting stared is surely important.

He is trying to get on track with his bills and what not but needs some support. 

Sounds like you're on the right track!

I can't see someone agreeing to sell me their house if they are only a few dollars behind on taxes, but I agree with you that it could be an indication they are delinquent on other bills.I'm just going to send to everyone and track the results.

I understand that certain websites won't track everything that happens in between.

By property, I'm looking to track cash flow by month (expected vs actual) appreciation, debt pay down, cash on cash expected vs actual, vacancy rate, etc etc.

@Talha Makki, I think @Ben Meisel is on the right track when it comes to aging and a constantly dropping price.