Neighbors of ours bought a "do it yourself" kit and rented a "ditch witch" to assist with the digging involved. They "saved" $300 doing it this way, BUT spent an entire weekend cursing each other out trying to get the thing laid.
After that it was up to them to train their dogs, and adjust the settings.
To top it all off, during a lightning storm a tree near the wire was struck and "back fed" into their house. They lost all appliances, computer, lap-top, answering machine, tv's, DVD/VCR's, etc. and lost their phone and electricity for 4 days while repairs were being made. All repairmen who worked at their house talked about how badly this was wired. My neighbors had followed the directions completely and showed the electrician the booklet. He asked for a copy so that he could show the various building depts. in the area how unsafe the do it yourself installations were, in hopes that they could perhaps give homeowners a heads up.
Incidentally, he told them an electrician could have come out for less than a $100 and made the connection correctly for them.