Track builds depend on what you want to do with the track and how much space you have available. Whether you want to hold club races or just use it for practice and tuning. All you really need is a router and a 1/8" bit. There are several methods you can use when routing the slot for turns.
I have used Trackmate for a lap counting system for years. You can purchase it with everything you need to connect it to your track for about $150. It is also compatible with Race Coordinator, and I later switched to using RC. The nice thing about using Race Coordinator through the Trackmate interface is you don't have the power shut off glitches like we experience at Al's.
As far as a power supply, the Pyramid units are very good. I picked my variable power supply up off of Ebay for quite a bit less. Search power supplies that are not slot car specific. Lab units are also very good. You can get as good or better than a Pyramid for less money.
I purchased a copper tape laying tool. I have laid copper tape with and without the tool and I'll tell you, the tool makes it a LOT easier! You're welcome to use mine if I can find it...........
Lastly, check with Chris. I think he would like to find a home for his current track. It is a small 3 lane track that fits in a corner. It is not very long but it is a blast to run on!