I don’t know if this fits your plan, but if I had to use electric tape for perimeter fencing, I think I would strong consider putting up two lines, one inside and one on the perimeter. Could use step-in posts and something less expensive for the interior line.
I’ve had two friends lose horses who got out of substandard fencing. Both were hit by cars. Both had gotten out before. Both families kept telling themselves it was a “fluke,” and did not want to spend more $$ on fencing. I had another friend whose horses were not killed, but did get out fairly regularly.
I just couldn’t take it if my horses got out and were injured or killed because I cut corners on the fencing. And I do understand budget constraints. An interior line and a perimeter fence, both hot, would make me feel better, if I had to go with hot wire.
I used to have my paddock fenced with electrobraid, it was a budget thing. Worried about it all the time. And I am at the end of a dead-end road off an abandoned highway, no road anywhere near that paddock. But if the power was out, or it got real dry, or the weeds grew up, or the snow got high … I was worried.
I don’t worry anymore since I got the Centaur flexible vinyl rail on wood posts for the perimeter. I use Horseguard for cross-fencing and love it.
And I do know that I am a worrier, so maybe I’m just over the top.