"0% ROI Inflection point"? Whats a Safe Under Market Value?

[Ariel G.]

Hi colleagues

I've been discussing this subject with a few people, and I get diverse opinions, what are your thoughts:

How rent values could be affected by depreciation?

Some people say there is a direct relationship, properties depreciate, rents go down, some people say they go up, or depends on the area. If it goes down would it be linear or maybe it goes down less than the property?

What's the minimal under market value % buy that provides a safe "insurance" against a potential negative CoCROI? 

How to estimate the inflection point of 0% ROI

I'd be happy to read your thoughts. 

Ariel.