Let’s use a real-ish example. Say you’ve got a quarter-acre lot in Middletown, the neighbors just put in a pool, and the dog has learned to wriggle under the old split rail. You want six feet of privacy around the back, maybe 150 feet of it with one gate. You’ve narrowed it down to wood or vinyl, and every website you’ve read says “it depends,” which, fine, but on what? Mostly on one thing: how…