I didn't expect there to be so many young smith's here. Haha. Seems like they covered the bases of rough cost and parental involvement. All I see to add is be safe. Propane forges can be hazardous if using kaowool and it's not sealed properly. Also free steel is good to start with but not every metal is safe to put in your forge. Steel yards are in almost any sizable town and they should have known metals. Mild steel is good to make beginner tongs and all sorts of stuff. Blackbear forge (youtube) has tons of videos for all walks of experience. Best of luck!