I suppose this is where this would get tough in the higher end homes with what would be generally a more sophisticated seller .. than a seller on a 100k home that is prevalent. 

You might check out how prevalent real estate teams are in your area.  

Additionally, we just learned the "hard" way about the expansive soils so prevalent throughout most of SA.Thank you all in advance for taking the time to read my post and consider any advice you may decide to give me.~ K.

There are areas where that is more prevalent and those that are ok, so just be careful if you don't know. 

Are there other cities and states or multi units are more prevalent?

However, radon issues are much more prevalent in Colorado than in Michigan.

This was more prevalent in the go-go days prior to 2008, but it still goes on today as well.There are actually, 8 or 9 criteria that the IRS uses to determine who is a dealer and there is case law on the subject going back to the 1960s, so a simple answer may not be the correct answer.If you contemplate doing development, you should have on your team a land development attorney as well as a CPA versed in dealer issues. 

At one point in time it seemed prevalent.

Seller Financing is more prevalent in the commercial arena as well.

By nature start up brands maybe have a 10 to 20 years shelf life as the world is constantly evolving and human needs change over time.What was prevalent today can be a distant memory tomorrow.