I don't feel right demanding they pay when I contributed to them missing a second month by not raising the red flag by noticing I hadn't received that month's rent.

Red, yellow, anything but blue turn it around and go away.... 

Red River Gorge, KY - 55.4%4.

What are the red flags? 

The Red River Gorge (Natural Bridge State Park) area is fantastic.

I did that with the one I bought and the seller had to replace the entire system as the drainage field was full of roots. 

That looks like a big red flag to me.

The pictures look nice, and a drive-by didn't trigger any immediate red flags, but I am budgeting for the worst just to be safe.   2) How would I go about making sure the title is clean?

And I for one am rooting for you 100%! 

I have been researching the Huntsville market for some time now, and one day I realized that there were a lot of rental listings on Zillow that had been sitting for more than 100 days, which is a red flag to me.