Making space to race

First I have to have a place to put the track. My basement room is unique in that it is directly under the garage (notice the big steel beams on the ceiling), so it is as big as a 2 car garage.  The track has been designed to fit just right.  I'm using mostly steel studs to build the walls which should help prevent any moisture or mold in the walls next to the concrete.  Hope to be finish the room in a month or two.