Not fair to come back to us months later.. after we have done our P and Ls and distributed the funds Do you have any rational as to why you don't owe the money ethically, morally or legally? 

Then they rationalize their way into a terrible deal.

If the rents are $20,000 per year, that is a ration of of 6.6.Of course, that is before all expenses. 

It’s designed to make emotions (greed, pride, ego) overrule rationality.

ex: median income $40k med income ÷ 12 months = $3,333 ÷ 1/3 (affordability ration- some will 1/4 to be conservative) =$1,111.

The choice is between rationalizing that the numbers within a mile somehow overshadow the numbers right next door...and they don't.What your question should be telling you is your gut is better at math. 

That said, given that most people will act in a rational manner, having the option to ask them to leave if they could not pay rent should make for a less dramatic situation. 

The dynamics of a short squeeze are real, but eventually rationality prevails.

@Thomas Willingham The 1% rule in real estate is a rule of thumb for a quick and dirty ration.

Rational response to low interest rates and high demand.