razor wire, snapping turtles, lots and lots of cats to mess with her allergies.
Get a pit bull?
LOL
That was my idea. The Berlin Wall was fairly successful, and he might be able to get segments for a reasonable price today. If not, then steel-reinforced concrete with an appropriate top decoration works. Concertina wire is cheap and can be laid down quickly. Dogs are more expensive than cats, but they can be trained.
“razor wire, snapping turtles, lots and lots of cats to mess with her allergies.”
A bit extreme, but not that much. The concept of having a perimeter around your house that won’t be breached, and then making sure that Grannie cannot see inside, can work. They can do what they want to try to get you to open the gate, but it would be your call to respond, or not.
I’ve told my kids that 200 to 300 miles is a good distance for the gramps, as that makes it a big deal for us to “drop-in”, but still makes visiting very doable.