I personally like BB&T, but that's because they're so easy to deal with since I do my core business banking there.  

This is the core to a deal.

Here's a fairly detailed academic paper on the subject:http://www.reri.org/research/article_pdf/wp171.pdfThe abstract kinda sums it up nicely -- in short, outperformance is all about timing and leverage:"Results demonstrate that while value-added and opportunistic private equity real estate investments have higher returns than core investments, their superior returns are driven by beleaguered market conditions as well as by the use of cheap debt."

Or, there has to be a compelling reason for me to provide my knowledge.

Once you get past a few keeping track of different keys is a pain and its easy to change the core out when there is turnover. 

Though, if I had a larger portfolio I would be selling a few to book profits and holding a core.  

Personally, I believe that your PM is going to be one of the core members as we tend to have a good pulse on the market, a network of referrals, and are in the trenches everyday for investors of all types.

The issue is we treat relationships differently.In order to have successful relationships you must establish “Core Values”.

The core of being a real estate investor is turning deals.

If you can present your offers as a solution to their problem (and not just as a dollar amount in exchange for the house), you'll make your offers much more compelling.