Currently reading:Verbal Judo - The Gentle Art of Persuasion...and The Camel Club by David Baldacci for pleasure.

The house is in a flood plain, so I can see a benefit to using concrete over a traditional wood supported floor when moisture/rot is an issue. 

If the existing hardwood is not sealed up completely the moisture from the concrete could cause the boards to warp and buckle causing other problems.

I have come up with the following options so far:-install shower with glass block window with tile surround and bath vent fan (no idea as to how waterproof this may be)-demo old tub, wall off window, install prefab tub/shower combo and bath vent fan -reframe window to be much smaller and higher on the wall, leave existing tub, install tile surround and plumbing for shower-leave as is and hope tenants don't care about not having a showerIn most of these cases it seems to really just boil down to whether I want to have a window that can be opened to alleviate wet room moisture, or install a vent fan. 

Both the forms cover pretty much everything - moisture issues, safety, housekeeping, appliances, light bulbs burned out, etc. 

The pads I threw away held all the moisture, but I still Shop-Vacced the carpet and left a fan there for them to run for a few days.We just bought this place in 2012 and have had this same tenant the whole time.

If you just cover what you have and paint, you're leaving moisture inside the walls that will eventually rot or mold.  

The WPC core is a good product in moisture areas.

He also said moisture readings in some joists were in the 20-30% range. 

Look into digging some soil and trench away from the house, put the proper foundation drains in, seal the foundation and be done.Having moisture in the basement continuously makes for a very muskey environment, I have hated that in every old house I have lived in.