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.  

This will give you more numbers to call to track down that tenant who skipped on you.  

There's little we can do to drastically change your tax position retroactively that you can't do yourself (like tracking down expenses). 

If you don't have a paycheck job and only get income from rentals, they will like to see several years track record.

I like their numbers.this works .. trying to build RV pads with no experince or track record as you probably found out is a NON starter. 

They also have nice reporting after the deal close with statuses and graphs on your various distributions plus tracking for tax forms.I also used RealtyMogul, RealtyShares, and FundRise.