I've always had an interest in economics and I feel that the best way to be on the lookout would be to examine a variety of factors.

Certain, uncertainty (variety), significance, or love/connection.  

@Brian Fournier There are a variety of tools depending on what you need.

The previous inspection had revealed that one of the trusses had been cut.

More expensive to replace and harder to modify than modern plastic variety In my opinion these aren't necessarily the deal breakers, as many people successfully own older homes, my friend being one (late 1,800s).  

It will help you to know there are many forums available on a wide variety of subjects.

@Luncy Jeter I find leads through a variety of ways.

Let them know that you plan to resell or wholesale or flip or whatever if that's what you intend to do but try to keep the response simple because the variety of options can be overwhelming and confusing to the average person who isn't in the investing business.

BP is a great place to network and meet a variety of individuals in the real estate arena.  

Our research revealed the old owner was incarcerated and there attempts by the county to notify him failed.