Your PM replaced the water heater because it was leaking.

It is best to have the washer and dryer in the basement if the washer or hoses leaks/overflows. 

-Structural (foundation, wall, ceiling and floor)-Roof and Exterior(Roof Condition,Gutters and Downspouts, Siding, Windows and Doors)-Plumbing (Water Pressure,Leaks, Drainage, Pipes)-Electrical (Wiring,Outlets and Switches,Breaker Panel, Lighting Fixtures)-HVAC(Air Ducts, heating and cooling)-Water and Moisture Issues(Attic, Mold and Mildew)-Kitchen and Appliances-Bathrooms-Pest and Insect Problems-Safety Features

I assume you are mostly looking for leaks and water damage?

They won't be able to fix that problem as there is probably a small leak in a pipe or a crack in the foundation or a bit of water coming in from somewhere or moisture building up in the home.I also agree with Nathan about taking the first contractor to small claims court.

If I had a bunch of houses and hired a plumber to fix a leak in the first house and he “fixed it” then six months his method fails.

I like the idea if the deal goes through to re-sell to another investor to get our money out of it and let him deal with mold issue, the leaking plumbing, and the leaky roof.

The inspector wanted me to add 2 screws to anchor the condenser and he did check for leaks at the gas connection (the gas connection that was flagged was decades old and I questioned if was before a permit was required but city stated it was up to me to prove that it was there prior to permit requirement).

Although Baselane doesn't have a formal app I find it very mobile friendly, I use it on both my iPhone and IPadI think Baselane has a slight edge over Stessa so I think I'll start with them and switch to Stessa if it's not working for me. 

Is there a pipe leak that is softening the soil anywhere nearby?