Here's my first Silver Spike set in 2008, which had 6 cars. When I dismantled this layout, I sold it along with the Lionel 2065 Hudson you see in the video. I regretted selling almost everything. So now I am buying again many of those items. The Silver Spike is a start. This was an unique layout in that it had several brands of track all intermixed.
https://www.youtube.com/watch?...c9SD0aM#t=185.556068
BTW, in the 80's i had a layout with the 70's era Atlas O 2-rail track, , sectional and flex. Was very inexpensive back then. ( $.99 per straight or curve) I installed an HO-scale rail for the center rail. Trains ran smooth and quiet. No need to modify wheels. Will try to find some pics to post.