Over concentration of a particular asset type in the portfolio is another type we will discount and bulk sell.

Mortgages aren't the Titans of Detroit that cars once were, and I have no personal material or financial interest in Detroit aside from (obviously) lots of telephone-only colleagues there, but it is one area I will be watching for a "repeat" of what can  happen when too much business in a metro area is concentrated in a single industry. 

-I love the advice of concentrating on a younger associate.

Multi-family over 4 units get to be a different thing as you have a higher concentration of tenants and the public on premises. 

In Las Vegas, for example, there are three major tenant segments: one with an average stay of less than one year, another with an average stay of over five years, and a third with an average stay of less than two years.How do you find a segment with a high concentration of people who stay many years?

I am concentrating on multifamily partnerships with cashflow within the first year and forced appreciation potential.

Concentrate on reducing your risk by getting as educated as possible before making a move.

I was into REI & stocks, but abandoned the equities after the infamous Black Monday (1987), so I concentrated on just accumulating Real Estate.

Here is some of my thoughts: You may need cash flow to pay the bills, but if you do not you should be concentrating on total return.  

That noob FTHB segment of my practice has grown really fast since I made the banker -> broker switch (which is why I did it), but my landlord loan production didn't really change all that much (I didn't expect it to), it went up MAYBE 10% or so, and that's mostly concentrated among those that say "I'm a real estate investor!"