It appears to me that my first post and subsequent posts were not read by all responding. It also appears that some people posting have not either read up on the offered dog fences or had first hand experience (which is where I was looking for responses from). I believe to two most popular E Systems both use back up power sources and also have surge protectors. I have done the literary portion of my research, I was looking for actual experience. Although we all have personal opinions, which I value the right to use. I was looking for first and actual experience. I think putting up a traditional or chainlink fence is impractical. My property is over 1.5 acres. Wheatens are vermin hunters and also jump quite high. I would also would plan to look into the actual type of correction she would get before putting anything on my pet. I have seen worse at the hands of correction.
I've had e-fencing (Invisible Fence brand) in the past. Although, at that time (it was installed 14 years ago), there was no backup power source (what a good idea, but costly?), my dogs were never out when I wasn't home, so I'd know if there was a power failure. Surge protectors are most certainly a good idea, although, luckily, in the 6 years I used the e-fence, that sort of disaster didn't strike.
I think e-fences are a great idea! Although I've heard time and time again that they don't work so well with hound doggies (I have a Basenji), I'm tempted to give it a try. I had the e-fence when I had a rottie and a dobie, and it was the greatest thing ever!