I have about 4.5 acres we want to enclose (tired of feeding the deer our home and garden materials (aspen, pine, everything else). I want to enclose the whole property.

I already have a 4' wire fence around the whole place, other than the driveway entrance. I know I need to install some sort of gate for that of 8'.

I've read that 8' is minimum for white tail (we have those and mule deer), but in some cases, 2 fences of 4' that are 3-4' apart will act as a deterrant equally. This would be a cheaper and easier option I think, so I'm exploring it.

I'm planning on doing the black poly fencing with t-posts. I could do 5'-6' posts and 5' fencing a few feet inside the current fence, or just do 10' T posts and 8' fence.

Any experience on this procedure? The area in question is in the field for the most part, so mowing isn't a problem, just trying to make the best decision. I'd like for it to be economical (as possible), and also be somewhat transparent.

Thanks!