Back in the 80's I was building my own track for my Garden line. Turned out to be a complete pain in the butt as I had been using Bonds 7's like Brass Spikes to hold the rail down into wooden sleepers. Problem was that the dampness and expansion plus contraction of the sleepers kept pushing the pins up. Needed to go over the line pretty well every time I had a running session to push them back down again. A real pain with over 150ft of line including Dual 45/32 Points etc. i did a sort of temporary fix on some of the worst bits by using Steel Pins, but they of course over time rust.
So I bit the bullet and went down the Peco route for track and have never looked back since. I did luck out at the time as my Boss had a Peco Account and sold me all my Track at Trade Price. I now use a mix of Peco, Trainline, LGB and Aristo on my new line. Worth while hunting out second hand track if you can get it. Points can be a great saving. Glendale and GRS frequently have track in from broken down collections, but you are a good way off from both of them at Derby.
JonD