Most clubs start off with a grass track which develops, and then as it wears astro is added until it is all astro. Whereas in comparison Bury has started off with a blank canvass and have skipped the first step, so have an astro covered blank canvass with some thrown in features.
Therefore I suggest: why not go back to step one? Build a grass track, its more easily sculptable and will develop given time/enthusiasm of workers, then add astro (save what you have) when the time is right.
Only downside, grass is a PITA to grow where you want it and be strong to race on, whereas the f**ker grows everywhere when you don't want it..
so perhaps alternative without being astro - dirt?
Im probably way off the mark.