I’ve been half looking into this too, I’ve looked at that book above and am going to buy it soon I think. If you’re on Instagram take a look at dick cheeseburgers page, shows a tiny pump track but looks good fun.
You can get “portable” pump tracks which schools hire from what I’ve gathered and gave me the idea to make some rollers from ply and see if it expands to a full track.
How much space can you spare?