re: electric fence or gps collar advice please

We have the Halo collar. It was on sale for $600 not long ago. The subscription is around $60 a year. It works great. You can set it to beep first, then vibrate if they get closer, then shock once they cross. He doesn't go further than the beep. When he's acting an arse, i can make the collar beep from my phone and he chills out. We've got fences drawn at our house, the camp, and both our parents house. You can hit a home button in the app and it whistles on the collar. He's learned that and I can see him coming on the map. We are on 3 acres.

Spot on is the other option. It's more expensive up front, but no subscription. If you want to see your dog on a map if they escape or just in general, you have to get the subscription though.