If the Dunking operator is weak paying market rent and I bought with 4 years left at an 8 cap then it's still a loser as with releasing costs I lose money.I could keep going on and on.

In weak moments, I would love to publicly share that context but I choose to take the high road and not do so as I have read snide business rebuttals in the past and find it generally comes of worse than little or no response.We are absolutely not perfect but we are striving to be better every day.

This past treasury auction was weak, as I finish this there is discussion of Schwab coming under investor focus as the majority of their income is based of interest rate related returns and many of their assets have an average yield of 2%ish..this is profitable in an ultra low interest environment where depositors are paid relatively nothing but if they flee to more secure assets..such as..real estate..their $7 Trillion empire could begin to wobble.

If you are on the buy side then the buyer still doesn't have control but one can sense weakness sometimes. 

Best way to figure this out is to get both numbers on a small list of diverse properties and then compare the numbers to comps you pull yourself until you get some confidence in the numbers.I've got to run, but I've written quite a bit here in other posts on the strengths and weaknesses of AVM's, so you might look for those posts.

You already have a good start on the first two, so focus on the other three.One of the greatest weaknesses I've seen over my 13 years on BiggerPockets: Landlords fail to learn how to properly manage their rentals.

"Live and let live" sentiments are seen as weak and a sign of an "entitled" underclass.

The exit strategy is weak comparatively and I'd "sacrifice" the modest cash flow potential of not being beach-front for a SFR a little inland that is just a better long-term investment as far as having multiple exit strategies.

Am I the only one who thinks this $75/mo of positive cash flow after you account for vacancy, pm, capx, etc on a $60,000 duplex is a pretty weak investment?

Weak sauce.