I only post to educate and advise, I have no business relationship in the advice I give, I don't, but may do business with select members (just disclosure but not actively engaged).

I'm using FHA so I only need 3.5% down and the bank will add 85% of the rental income toward my income for qualification (this is common).  

Any negative impact you've experienced?

Are there any other types of real estate investments (fix and flip, rent to own, note brokering) where having a realtor license would be a negative thing?

Who still wants negative growth now?

I only made that mistake once.   

I have been researching this on the web tonight and find many negatives and few positives.

Here’s a brief description:(1) Recovery: Negative rent growth; Below inflation rental growth.

Many residents, who originally chose their neighborhoods for the mix of single family homes, quiet streets and parking availability, are finding that recent developments are negatively impacting the quality of their communities.Source(s):Reviving the City of Aspiration – Center for Urban Future (http://nycfuture.org/images_pdfs/pdfs/CityOfAspiration.pdf)City to Middle Class: Just Not That Into You (http://observer.com/2009/02/city-to-middle-class-just-not-that-into-you/)

Chimney's create an updraft within themselves - a negative pressure.