IE if you patch the drywall, 3-6 months later you will have drywall cracks again if you dont get the underlying foundation fixed, and begin to maintain the moisture levels around the house.6)Almost all old houses will have current or past issues with termites.

Over time the wood is going to expand and contract with changing temperature / moisture levels and eventually will begin to bow outward and fail.

Should any moisture barrier have been installed?

This tool pointed out areas inside drywall that have had moisture issues.

When the sealer fails moisture will absorb in causing stains and allowing for possible mold/mildew growth.

You are trying to penetrate one of if the most competitive markets for wholesaling in America.

This will let you know if there are any plumbing leaks or any clogs in the sewer lines.2nd look at the foundation very closely, look for any stress cracks and see if any moisture coming in.3rd check out the HVAC systems.

This past week there was a heavy rain storm and the front yard and back porch area got alot of water and caused water to penetrate the walls and garage door.

BTW the joists look good but a lot of the subflooring has been ruined by the moisture.

With a crawlspace there has to be sufficient ventilation for moisture to be cleared out from under the house (much like attic ventilation).