I would suggest concentrate in building a team that will help you.

Last year I bought an awesome house that had cat piss concentrations that would give you an asthmatic attack.

After listening to one of the BP podcasts, I heard someone say that you should concentrate on neighborhoods.  

They both have their strengths and weaknesses and in my opinion both of them belong in a balanced portfolio.2) Direct real estate: If you are cash poor and time rich, a heavy concentration on direct real estate can make sense.

There have been virtuous men and women in penthouses, but there have also been virtuous men and women in concentration camps and cardboard boxes.

However, there's a saying we often used in the advisory business - it takes concentration to create wealth, and diversification to preserve it (which again goes back to goals - if you just want a decent retirement, investing in the S&P 500 at an early age is fine.

It’s just always been that way here, a big concentric circle of people moving out from Los Angeles.  

Don't worry about pay back concentrate on your profits.

A low output generatorator will not get a large room to sufficiently high enough ozone concentration to kill mold and smoke odors at the source.

Stay out of their problems and concentrate on business.