Congratulations and good luck. Since you didn’t ask for relationship advice, I’ll stick to train advice. I’ll trust you have the rest in order 😉
can you share a link to the layout / track plan you are looking to mimic?
For risers, just use 1x4s cut to the appropriate height. No need buying all of that premade foam. You may also want to add horizontal plywood support over the risers and below the track.
Depending on how much track you need, you may consider looking into tubular track. You can often acquire this much cheaper than fastrack.
