What uncommon "rules of thumb" / heuristics do you use to decide if it's a real "deal " ?  

Where I'm at in KC (which is probably pretty similar to where you're at in Oklahoma), it isn't uncommon.

It's not uncommon for the make-up of a household to change over time, especially with long-term tenancies.

Then if I do hit vacancy I believe I could update the lower unit and likely get rent up to $700 or more which is not uncommon for 2 bed / 1 baths in the area.On top of that, I'll move out 2 years down the road (2 years so I gain the landlord experience for myself and to qualify rental income) and start renting out the one I occupied thus putting my cashflow upwards of $550-650.Any and all feedback is welcome and encouraged.

However, it is not uncommon for the Treasury Department to issue Regulations providing some relief. 

That's not uncommon and I don't let that deter me from a deal, as long as it cash flows to my standards once permanent financing is put in place.

It’s not uncommon for rental properties here.

This is not that uncommon in lower income rentals.

It would be a very very uncommon situation for you to be talking directly with the trustee negotiating the purchase of a property in BK.

You get mice when tenants live like pigs, it's not uncommon in C properties, and is a ongoing issue to deal with.When dealing with tenant issues you must immediately respond by issuing no pay no stay notices on the day after rent is due and notify their handler immediately.