Your friend being a car lot would need to check the soil to make sure they do not have environmental contamination.  

Find out if they will insulate the floor from underneath or inside.  

Water intrusion in crawl spaces and basements is very common but fortunately, in most cases easily remedied. 99% of water intrusion is due to inadequate drainage to to the condition of or lack of gutters and downspout and improper soil grading around the foundation.

Crazy how much mold is underneath all of the units, so I'm sure it's deep in the walls, etc.

Originally posted by @Kyle Hipp:I had one property that had carpet on he stairs and underneath that was asbestos tile on the stairs.

I've done some deals and have some experience underneath my belt, recently I was approached by some potential investors and want to immerse myself in the overall strategies and how it works. 

Everyone from the inspector to the contractors have been calling it that but that side of the house has less room underneath than the other parts with the crawlspace.

As a real estate agent, what do I need to know about testing for soil around the houses I'm listing?

Investing however, is planting it after you have studied the soil, the climate and everything else that will make this plant thrive.

Currently my methods to locate the property have been:- researching the APN of vacant land to locate owner information and try and contact the owner (Title Search);  - reach out to Commercial Lenders/Bankers; - contact city redevelopment; and now - the BP investment community for more productive method of finding the proper land, proper zoning, no soil contamination, title or right of way issues.I am at a bit of an road block and would appreciate any constructive ideas the BP community is willing to provide.