Check out the last fence in this literature, the Penn State Electric deer fence. They are all over PA and the State Game Commission has a cost sharing program but that is for protecting crops, not food plots. Given that the cost for an average size fence to protect crops, material and labor, is $7,700 a fence for a couple of acre food plot would be substantially less. There is an occasional incursion, but the fences work well.

https://www.all-creatures.org/hope/D...%20Fencing.htm