If your doing the internals, you will need more than just the rods themselves.
You will need Rods, pistons, uprated headgasket, main stud kit, head stud kit, gasket set. That is the bare minimum for a bottom end build, the very minimum. Factor into that the cost of machining your cylinders for the pistons, cleaning, assembly costs etc etc.
You'll be spending more than 12k if you are doing the bottom end as well as the supercharger.
You would also need a decent exhaust system, gauges, 1 step colder plugs to support the blower.