Premier 1 electric goat fence
Not cheap but a 164' roll costs the same as just two 16' goat panels at TSC, you might need 2 rolls for the number of goats you have. The solar energizer will be another 3-4 panels equivalent. If you go this route pay the extra $20 for the double spike posts.
This is much easier to move than a goat panel fence since you only need T-posts on the corners because the stepin posts the net is connected to need to pull back to a sturdy post at those points. Premier1 has a "FiberTuff" post that can be used on corners.