Okay,If I end up buying a 160 acre piece of property, how large of a area would I need to put off limits to set up a "safe haven"?

I was thinking something along the lines of 15 acres of the most heavily wooded area. Would that be enough area for a safe haven? That's about all I could setup on the property I'm looking at buying, there are probably only 50 acres of wooded area withquite a bitbeing relatively open.

Here's a tentative plan I drew up really quickly:



I would probably keep the larger cultivated fields rented out to bring in a tiny bit of income and I'm really not setup to plant 20+ acres fields anyway.

What do you think?

Thanks, Nathan