Give your tenants the EPA "A Brief Guide to Mold, Moisture, and Your Home" booklet.

One $20K expense (reskin interior, moisture damage, HVAC, foundation issues) and you've got an average deal or worse.

There are some holes in the outer wall that we'll fix and will hopefully stop future water intrusion...but I don't know the climate well enough to know what is "normal moisture" in this region...Do these seem like "medium" priorities?

Quote from @Ben Bechard: Mold requires a water source to grow, so there's clearly still a moisture issue down there.

This can allow moisture to get into the uncured paint film allowing certain components to come to the surface when the moisture evaporates, causing surface staining and possible adhesion problems.I don't know how experience you are with rehabs, but 6 weeks are only doable if you stick to paint and carpet and don't do any rough in electrical, plumbing and drywall work.

You should seriously consider getting dehumidifer(s) and fans running to get that moisture out of the house..

Moisture between panes? 

The problem is the crawl space is too small for the home inspector and termite/moisture inspector to get into.

Renters in that demographic aren't likely to keep up with the home, increasing the chances of moisture/mold build up, soft spots, interior rot, heavy smoking damage, etc.

It's a basement unit with moisture which is why I chose vinyl