gehajake,
My in-laws had a terrible problem with deer eating their landscaping until an old farmer told them to put a single strand of electric fence about 6 inches off the ground. I doubted that would work myself but 4 years later and they no longer have any problems with deer. It sounds crazy I know but you learn something new everyday. For fruit trees at the cabin I cut 10 foot sections of 2x4 fencing wire, drove 2 T post on opposite sides of each tree and formed a circle around each tied to the T posts about 10 inches off the ground to bush hog. I’ve had no problems with deer since I put them up last summer. The T post idea came from someone on here but I can’t remember who did it, maybe RAH?
It may have been me that talked about a fence off the ground for mowing purposes, I did that for my fruit trees several yrs ago and love it.
As for the wire 6 inches above the ground, that may work great, Ive been doing that at home around my garden for yrs to keep coons and possums out of my tomatoes, a hot wire about 4 inches off the ground then a grounded wire about 4" above that with another hot wire about 4" above it, the whole thing is only about a ft tall but I haven't had a varmint or a deer in my garden since, I just figured I got lucky on the deer part, didnt realize that low wire may have been keeping them out.