Built many a 1/24 scale tracks in my day, commercial and home. At one of my homes years ago, I built a track in my back yard, then built a room around it! Lots of fun! Use batteries to power it and a charger on the batteries, use 6 - 8 ga wire (depending on the length of the track) underneath and jump into the braid (or tape) every 6 feet and you'll never have a current problem.

We used to build the tracks and use rings on our routers to slot them, 6" ring for the first lane, 12" for the second and so on. Use the guard rails as guides for the router rings, works great. I used to rewind the armatures and advance the commutators, reset the magnet and haul a$$. Been years but it was a load of fun. Darn you! Now I see there a track in my neck of the woods, DARN YOU!!!!