If I had one bit of advice then it would be take any figure you're considering as a budget, and times it by 3. You initially factor in all the big things you need to open/run a site......but it's the small things that add up. Trust me, I speak from experience
I realise this might be a woodland site which isn't my "area" so to speak, but labour for building zones is also something to consider. If we didn't have the support of my team/refs/friends this past 12 months, then the site wouldn't be as it is now. You can't ever put a price on people like that.....they're just what we now call "family".