Select a basic area where Zeus can play and fence in that area. A cantillever gate will be about $2000. It opens and shuts with a Door King operator and remotes are in your cars or you can carry a remote. Here is a link to display the gate:
Chain Link Cantilever Gates and Slide Gate Operator Kits - Hoover Fence Co.
Scoob (Jim)
P.S. I also have information about a driveway alarm that will sound a tone in your house (wireless) when anyone comes down your driveway. Not expensive at all -- about $400.