Fans do little but move moist air around, Blowing air out may do little
more and in winter cool you down. Get a dehumidifier that is the normal
route, before I had one it was always humid. 2 fans running 24x7 will
probably use more energy than a dehumidifier. If it is below 63 in the
basement most models freeze up, Sears has a unit that runs to 45. Mold
you can spray with bleach in a garden sprayer to kill it. A dehumidifier
also adds a few degrees heat making basements more comfortable.