wood or concrete basement floor

I want to finish my basement. Headroom is not an issue as it is ten
feet from the dirt floor up to the bottom of my first floor joists.

Would it be better (and or cheaper) to "build" a floor similar to my
first floor floor (joists, sheathing, ...) or to pour a concrete slab.
The floor covering will be carpet.

The "wood" floor I would build myself, the concrete floor I would have
to pay for labor and materials.

The basement is approximately 25' x 12'. The basement walls are
concrete block filled with concrete and rebar and coated with Quikwall
surface bonding cement.

Jess