As for SFR a pre approval letter is of value because most institutional lenders will close the loan with the main qualification being the buyer himself, as long as the property appraises for a certain value.Loans secured by commercial real estate are much more dependent on the property itself and all its characteristics, not just the appraised value.  

Each property's characteristics match the housing requirements of only a single tenant segment.

In my opinion investors buy properties with break even or negative cash flow and hope for large appreciation are taking a gamble.

Unfortunately, If there are no other verifiable facts to support a better value, than it is usually futile to appeal based on opinion and/or interpretable characteristics alone (i.e. the Subject is in superior condition to this comp and therefore, it should be valued higher, etc.).

Gambling addiction,drug addiction, seems familiar.

These neighborhoods exist and aren't difficult to spot but most ignore the characteristics because they are hyper focused on whether they can achieve their BRRRR refinance and ignore everything else. 

The diagram below shows the required income characteristics and what they are dependent upon.

So a realtor is a big gamble at that point. 

Eventually, they moved forward without issues...but it’s a gamble.

Richard Gamble hosts a large meetup in Knox.