>>2703795this guy is pretty spot on.
we're on 7, but neighbors are like 200' away. I can hear them talk on their property occasionally, dogs barking, chainsaws etc. pretty private (visually), but definitely aware of neighbors. BUT we're abutting a few thousand acres of BLM forest, so it's not too bad. (and they're good people)
You're not going to be hunting on anything less than 100 acres, and even then -- it will depend solely on what's around you.
anything more than 3-5 acres is fine for homesteading type stuff, but more is better. The only exception I can think of being being if you found a smaller lot that's surrounded on 3 sides by NF/BLM land WITH NO EASY ACCESS FOR RANDOMS.
other things to consider, is it inside or outside of an urban growth boundary? if it's inside, walk away, now. you will undoubtedly have subdivisions popping up all around you within a decade or so. Then county regs on development, make sure you can even build on it, water / well rights, etc. basic due diligence. It's kind of a retard-faggot thing on /out/ to assume you can just buy a plot of land and just put up a dwelling, it's almost never that simple.