I find their balance of reputation, tools, and entrepreneurial environment to suit my needs as someone that splits my time about 50/50 between personal investments and sales.  

You really need to compare what your ROI will be, or your cash on cash return.As far as finding properties, there is no one method, especially in this environment. 

That allows for trapping of moisture under the home, creating an environment for mold growth, and allowing the wood to warp.

As for drainage, that is a buyer issue and will be part of any inspection the buyer chooses to have.https://www.epa.gov/report-environment/contaminated-land

If the dilemma is bigger than simple then I find a way to make it right for all parties.Another comment- It is very easy to see low income students as victims that need saving, but for the most part there are way too many problems that need solving down to the main root problem which to me is familial culture and environment.

I think RE is often local and the behavior of one area does not necessarily transfer to another area.In primary market, many of the residential multiplex (duplex to quad) are fishing with their listings. 

.* People in professions or entrepreneurial environments, who will actually teach.

Theoretically, in a rising cap rate environment, a bank's portfolio management department could review their loans and decide to call due buildings which are underwater.

PLEASE DONT ADD EXTRA CHEMICAL or Pesticide TO YOUR ENVIRONMENT or house or future home of tenant.The truth is, recommending or using undiluted sodium hypochlorite aka "bleach" to kill mold for new inexperienced person is probably one of the worst things you can do to new landlords in ANY PUBLIC FORUM WHERE YOU DONT KNOW SERIOUSNESS OF SITUATION or health of user ESPECIALLY with VACANT HOUSE WITH water damage.

What are the environment risks - flood, tornado, hurricane, earthquake, weather impact on the physical asset?